CPC Definition - Subclass H05H

Last Updated Version: 2023.08
PLASMA TECHNIQUE (fusion reactors G21B; ion-beam tubes H01J 27/00; magnetohydrodynamic generators H02K 44/08; producing X-rays involving plasma generation H05G 2/00); PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS (obtaining neutrons from radioactive sources G21, e.g. G21B, G21C, G21G); PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS (atomic clocks G04F 5/14; devices using stimulated emission H01S; frequency regulation by comparison with a reference frequency determined by energy levels of molecules, atoms, or subatomic particles H03L 7/26)
Definition statement

This place covers:

Systems and methods for handling plasma, i.e.:

Generating plasma;

Confining plasma.

These systems are essentially related to experimental plasma systems used for studying the conditions for a controlled thermonuclear fusion.

Methods for investigating plasma, i.e. for measuring plasma parameters;

Systems and methods for generating local plasma to be used in industrial applications, e.g. plasma torches for cutting, welding, spraying or incinerating;

Systems and methods for generating and/or accelerating neutral particle beams, i.e. atomic or molecular beams, neutron beams;

Targets for producing nuclear reactions under irradiation;

Systems and methods for accelerating charged particle beams, i.e electrostatic accelerators, linear accelerators, magnetic induction accelerators, magnetic resonance accelerators.

References
Limiting references

This place does not cover:

Nuclear fusion reactors

G21B 1/00

Ion beam tubes

H01J 27/00

Gas-filled discharge tubes for surface treatments

H01J 37/32

Mass spectrometers

H01J 49/00

Producing X-rays involving plasma generation

H05G 2/00

Informative references

Attention is drawn to the following places, which may be of interest for search:

Atomic clocks

G04F 5/14

Obtaining neutrons from radioactive sources

G21

Radioactive neutron sources

G21G 4/02

Techniques for handling particles or ionising radiation not otherwise provided for; Irradiation devices; Gamma ray or X-ray microscopes

G21K

Lasers

H01S

Magnetohydrodynamic generators

H02K 44/08

Frequency regulation by comparison with a reference frequency determined by energy levels of molecules, atoms, or subatomic particles

H03L 7/26

Generating plasma; Handling plasma
Definition statement

This place covers:

  • Methods for investigating plasma, i.e. for measuring plasma parameters;
  • Systems and methods for confining a plasma by electric, magnetic or electromagnetic means;
  • Systems and methods for heating and sustaining a plasma, in particular for performing nuclear fusion reactions, at laboratory scale;
  • Systems and methods for generating plasma for industrial applications.
References
Limiting references

This place does not cover:

Nuclear fusion reactors

G21B

Discharge vessels for exposing objects to the discharge

H01J 37/32

{Investigating plasma, e.g. measuring the degree of ionisation or the electron temperature}
Definition statement

This place covers:

Methods for measuring different parameters inherently associated with plasma, by using radiation, thermal, electric, magnetic or acoustic means.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Measuring the arc parameters in a plasma arc torch

H05H 1/34, H05H 1/36

{by using photoelectric means (H05H 1/0031 - H05H 1/0043 take precedence)}
References
Limiting references

This place does not cover:

Investigating by interferrometry

H05H 1/0031

Investigating by spectrometry

H05H 1/0037

Investigating by using infrared or ultraviolet radiation

H05H 1/0043

{by spectrometry}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Investigating strength properties of solid materials by application of mechanical stress

G01N 3/00

Mass spectrometry

H01J 49/00

{by using X-rays or alpha rays}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Investigating materials by particle or neutron radiation

G01N 23/00

{by using neutrons}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Investigating materials by particle or neutron radiation

G01N 23/00

{by using microwaves}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Investigating materials by use of microwaves

G01N 22/00

{by thermal means}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Investigating materials by use of thermal means

G01N 25/00

{by electric means}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Investigating materials by use of electric or magnetic means

G01N 27/00

Measuring electric or magnetic variables

G01R

{by magnetic means}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Investigating materials by use of electric or magnetic means

G01N 27/00

Measuring electric or magnetic variables

G01R

{by acoustic means, e.g. ultrasonic}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Investigating materials by use of ultrasonic, sonic or infrasonic waves

G01N 29/00

Arrangements for confining plasma by electric or magnetic fields; Arrangements for heating plasma ({G21B 1/00 takes precedence;} electron optics H01J)
Definition statement

This place covers:

Systems and methods for confining a plasma; systems and methods for heating and sustaining the confined plasma.

References
Limiting references

This place does not cover:

Closed discharge vessels for plasma treatment of objects exposed to the discharge

H01J 37/32

using cusp configuration (H05H 1/14 takes precedence)
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Plasma containment vessels with magnetic mirrors

H05H 1/14

wherein the containment vessel forms a closed or nearly closed loop {(G21B 1/05 takes precedence)}
Definition statement

This place covers:

Laboratory systems in which plasma is confined in closed toroidal or helical loops by externally applied magnetic fields.

Relationships with other classification places

Nuclear fusion reactors (operated as prototypes for industrial energy production) based on closed-loop plasma containment systems are classified in G21B.

References
Limiting references

This place does not cover:

Field Reversed Confinement nuclear reactors

G21B 1/052

Stellarator nuclear reactors

G21B 1/055

Tokamak nuclear reactors

G21B 1/057

wherein the containment vessel is straight and has magnetic mirrors
References
Limiting references

This place does not cover:

Electron mirrors

G21K 1/08

using externally-applied electric and magnetic fields
Definition statement

This place covers:

Laboratory systems in which plasma is generated and confined by application of external magnetic fields and electric fields.

References
Limiting references

This place does not cover:

Discharge vessels in which objects are exposed to the discharge

H01J 37/32

wherein the fields oscillate at very high frequency, e.g. in the microwave range {, e.g. using cyclotron resonance}
Definition statement

This place covers:

Laboratory systems in which plasma is generated and confined by application of external electromagnetic fields at RF or microwave frequency, often operated in condition of electron-cyclotron resonance or ion-cyclotron resonance.

References
Limiting references

This place does not cover:

Discharge vessels operated at RF or microwave frequency, in which objects are exposed to the discharge

H01J 37/32009

Ohmic heating
Definition statement

This place covers:

Laboratory systems in which the plasma is heated by inducing a current through it. The current is induced by an electromagnetic winding linked with the plasma torus, i.e. the plasma acts as the secondary winding of a transformer.

media0.jpg

References
Limiting references

This place does not cover:

Nuclear fusion reactors

G21B 1/05

for injection heating {(G21B 1/15 takes precedence)}
Definition statement

This place covers:

Laboratory systems in which high-energy atoms are injected into the ohmically heated, magnetically confined plasma. The atoms are ionized as they pass through the plasma and are trapped by the magnetic field. The high-energy ions then transfer part of their energy to the plasma particles in repeated collisions, increasing the plasma temperature.

media0.jpg

References
Limiting references

This place does not cover:

Nuclear fusion reactors

G21B 1/05

Generating plasma {(nuclear fusion reactors G21B 1/00; gas-filled discharge reactors H01J 37/32)}
Definition statement

This place covers:

Arrangements for generating plasma to be used in industrial applications, i.e.

  • Plasma torches for cutting, welding, surface treatments or spectrometry;
  • Plasma systems, other than torches, for treatment of objects or incineration;
  • Devices using a plasma discharge for specific applications, e.g. spark gaps, plasma guns;
  • Microplasma systems;
  • Plasma acceleration systems;
  • Power supply systems for the arrangements covered by this group.
Relationships with other classification places

Thermonuclear plasma generating and confining systems for use in nuclear fusion reactor plants are dealt with in G21B 1/00. Plasma generating and confining systems for laboratory nuclear fusion studies are dealt with in H05H 1/00 - H05H 1/22. H01J 49/00 covers the particle spectrometer or separator tubes. H05H 1/24 covers the plasma generation and therefore includes the torches used to generate a plasma from a gas. In gas spectrometry, a gas is normally turned into plasma and the electromagnetic emission is analysed. The torches used to turn such gas into plasma are generally classified in the lower subgroup H05H 1/30, because they use an electromagnetic field to activate the plasma gas.

References
Limiting references

This place does not cover:

Nuclear fusion reactors

G21B 1/00

Gas-filled discharge tubes for surface treatments

H01J 37/32

Informative references

Attention is drawn to the following places, which may be of interest for search:

Ohmic heating

H05H 1/20

Injection heating

H05H 1/22

{using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes}
Definition statement

This place covers:

Arrangements for generating plasma using dielectric-barrier discharges, i.e. a dielectric is interposed between the plasma generating electrodes.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Dielectric-barrier discharges in gas-filled discharge tubes

H01J 37/32

{using acoustic pressure discharges}
Definition statement

This place covers:

Arrangements for generating local plasma by application of pressure waves to a gas or liquid-filled medium, i.e. cavitation, sonoluminescence.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Plasma generated by shock-waves

H05H 1/52

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Cavitation

Collapse of gas bubbles trapped in a liquid medium

Sonoluminescence

Emission of light by compression and collapse of gas bubbles in a liquid medium

Plasma torches
Definition statement

This place covers:

Plasma torches, whereby a plasma torch is meant as a device for generating a directed flow of plasma, e.g. used for cutting or welding metals, for localized surface treatment of objects or spectroscopic analysis. In particular, this group covers:

  • Torches in which plasma is generated by applied electromagnetic fields, e.g. torches for spectrometry;
  • Torches in which plasma is generated by establishment of an arc, e.g. non-transferred arc, transferred arc or both.
Relationships with other classification places

Systems for metal working which include a plasma generating torch are dealt with in B23K 9/00 and B23K 10/00.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Generation of plasma by RF or microwaves

H05H 1/46

Metal spraying

B05B 7/18, B05B 7/20

Metal working with constricted arc

B23K 10/00

Devices external to, and connected to, the plasma generating torch

B23K 10/00

Generation of plasma in a gas-filled tube

H01J 37/32

Cooling arrangements
Definition statement

This place covers:

Arrangements within a plasma torch for cooling the components of the torch and evacuating the heat produced during the torch service.

using applied electromagnetic fields, e.g. high frequency or microwave energy (H05H 1/28 takes precedence)
Definition statement

This place covers:

Torches in which plasma is generated by high-frequency electromagnetic fields (e.g. inductive coils enveloping the torch), in particular used for spectroscopic analysis.

media2.jpg

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Arrangements for arc stabilization by means of externally applied magnetic fields

H05H 1/40

Mass spectrometry

H01J 49/00

using an arc (H05H 1/28 takes precedence)
Definition statement

This place covers:

Torches in which plasma is generated by establishing an arc discharge between two electrodes.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Generation of plasma by RF or microwaves

H05H 1/46

Metal spraying

B05B 7/00

Devices external to, and connected to, the plasma generating torch

B23K 10/00

Generation of plasma in a gas-filled tube

H01J 37/32

Details, e.g. electrodes, nozzles
Definition statement

This place covers:

Details related to the electrical and mechanical components of a plasma arc torch.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Circuits for supplying power to the torch

H05H 1/36

Features related to welding or cutting electrodes

B23K 9/24

{Arrangements for stabilising or constricting the arc, e.g. by an additional gas flow}
Definition statement

This place covers:

Arrangements for controlling the discharge generating arc, e.g. shaped nozzles, secondary gas circuits.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Arrangements providing protecting fluids coaxial with the plasma jet

H05H 1/341

Arrangements for arc stabilization by means of externally applied magnetic fields

H05H 1/40

{Arrangements for providing coaxial protecting fluids}
Definition statement

This place covers:

Arrangements for protecting the plasma jet exiting from the torch, e.g. from mixing with and/or cooling by the surrounding atmosphere.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Arrangements for controlling the plasma jet

H05H 1/3405

Circuit arrangements (H05H 1/38, H05H 1/40 take precedence)
Definition statement

This place covers:

Circuits arrangements for supplying electric power to the torch, and arrangements for supplying gases to the torch.

Relationships with other classification places

The arc welding or cutting systems, in which a plasma arc torch is inserted, are dealt with in B23K 10/00 and B23K 9/00.

References
Limiting references

This place does not cover:

Guiding or centering of electrodes

H05H 1/38

Applied magnetic fields, e.g. for fucusing or rotating the arc

H05H 1/40

Circuits for arc welding systems

B23K 9/09, B23K 9/10

Guiding or centering of electrodes
Definition statement

This place covers:

Systems for guiding consumable electrodes in the torch.

References
Limiting references

This place does not cover:

Automatic systems for feeding consumable electrodes to the torch

B23K 9/12

using applied magnetic fields, e.g. for focusing or rotating the arc {(cf. B23K 9/08, B23K 9/073)}
Definition statement

This place covers:

Arrangements for controlling the discharge generating arc with magnetic means.

References
Limiting references

This place does not cover:

Arrangements for controlling the discharge generating arc with mechanical means

H05H 1/3405

Circuits for magnetic control of the arc in arc welding systems

B23K 9/08, B23K 9/0737

with provisions for introducing materials into the plasma, e.g. powder, liquid ({arc stabilising or constricting arrangements H05H 1/3405; coaxial protecting fluids H05H 1/341;} electrostatic spraying, spraying apparatus with means for charging the spray electrically B05B 5/00 {; cf. B23K 9/324, B05B 7/22})
Definition statement

This place covers:

Torches provided with arrangements for introducing materials into the plasma, e.g. precursors for material treatment, either within the torch or at the torch plasma jet exit.

References
Limiting references

This place does not cover:

Electrostatic spraying apparatuses

B05B 5/00

Devices for supplying a welding powder

B23K 9/324

using applied electromagnetic fields, e.g. high frequency or microwave energy (H05H 1/26 takes precedence)
Definition statement

This place covers:

  • Plasma systems, other than torches, for treatment of objects, wherein plasma is generated by applied electromagnetic fields, e.g. microwaves, radiofrequency;
  • Microplasma systems.
Relationships with other classification places

Discharge tubes or vessels for plasma treatment of objects under controlled pressure are dealt with in H01J 37/32.

References
Limiting references

This place does not cover:

Plasma torches

H05H 1/26

Informative references

Attention is drawn to the following places, which may be of interest for search:

Dielectric barrier discharge devices

H05H 1/2406

Plasma devices using an arc

H05H 1/48

Discharge tubes with provision for introducing objects or material to be exposed to the discharge

H01J 37/32

{using corona discharges}
Definition statement

This place covers:

Plasma systems, other than torches, for treatment of object surfaces, wherein plasma is generated by a corona discharge (i.e. the discharge occurs when the strength of the electric field around the electrode is high enough to form a conductive region, but not high enough to cause electrical breakdown or arcing to the object).

References
Limiting references

This place does not cover:

Dielectric barrier discharge devices

H05H 1/2406

using an arc (H05H 1/26 takes precedence)
Definition statement

This place covers:

Plasma systems, other than torches, for treatment of objects, wherein plasma is generated by establishment of an arc, e.g. incinerators.

References
Limiting references

This place does not cover:

Plasma torches

H05H 1/26

Informative references

Attention is drawn to the following places, which may be of interest for search:

Systems with plasma generated by EM fields

H05H 1/46

and using applied magnetic fields, e.g. for focusing or rotating the arc
References
Limiting references

This place does not cover:

Torches where plasma is generated by applied EM fields

H05H 1/30

Controlling the arc by EM fields

H05H 1/40

using exploding wires or spark gaps (H05H 1/26 takes precedence; spark gaps in general H01T)
Definition statement

This place covers:

Systems using local plasma generation for specific applications.

References
Limiting references

This place does not cover:

Plasma torches

H05H 1/26

Informative references

Attention is drawn to the following places, which may be of interest for search:

Spark gaps in general

H01T 1/00

Plasma accelerators
Definition statement

This place covers:

System and methods for accelerating ions and/or electrons out of a plasma.

References
Limiting references

This place does not cover:

Ion thrusters

F03H 1/00

Ion sources for ion beam tubes

H01J 27/02

Electron sources for spectroscopy

H01J 49/08

Ion sources for spectroscopy

H01J 49/10

Production or acceleration of neutral particle beams, e.g. molecular or atomic beams
Definition statement

This place covers:

Systems and methods for generating atomic beams, molecular beams and neutron beams, as well as systems and methods for generating electromagnetic radiation.

References
Limiting references

This place does not cover:

X-ray or gamma detectors

G01T 1/00

Neutron detectors

G01T 3/00

Manipulation of neutral molecules by optical means

G02B 21/32

Charge exchange devices

G21K 1/14

Irradiation devices

G21K 5/00

Molecular or atomic beam generation {(charge exchange devices G21K 1/14; polarising devices G21K 1/16; using resonance or molecular beams for analysing or investigating materials G01N 24/002; atomic clock G04F 5/14; beam masers H01S 1/06)}
Definition statement

This place covers:

Systems and methods for generating a beam of molecular or atomic particles, e.g. by irradiation of a target or by neutralization of charged particles.

References
Limiting references

This place does not cover:

Neutron generation

H05H 3/06

Molecular beams for analysing or investigating materials

G01N 24/002

Optical traps

G02B 21/32

Atomic clocks

G04F 5/14

Charge exchange devices

G21K 1/14

Polarising devices

G21K 1/16

Cathodic sputtering

H01J 37/34

Beam masers

H01S 1/06

Acceleration by electromagnetic wave pressure
Definition statement

This place covers:

Systems and methods for accelerating electrically neutral particules by means of electromagnetic fields (e.g. by exploiting their dipolar electric moment, levitation devices) and for accelerating or cooling atom beams (e.g. atom traps, atom chips).

References
Limiting references

This place does not cover:

Use of photons for propulsive thrust

F03H 3/00

Manipulation of neutral molecules by optical means

G02B 21/32

Handling charged particles

G21K 1/00

Generating neutron beams (targets for producing nuclear reactions H05H 6/00; neutron sources G21G 4/02)
Definition statement

This place covers:

Systems and methods for generating neutron beams, e.g. by impacting a target in a sealed envelope, by collision of particle beams, for logging tools, for material detection).

References
Limiting references

This place does not cover:

Targets for producing nuclear reactions

H05H 6/00

Radiation detectors

G01T

Neutron prospection and detection

G01V 5/00, G01V 5/10

Neutron generation by low-temperature nuclear fusion

G21B 3/00

Neutron generation in fission nuclear reactors

G21C

Radioactive neutron sources

G21G 4/02

Direct voltage accelerators; Accelerators using single pulses (H05H 3/06 takes precedence)
References
Limiting references

This place does not cover:

Generating neutron beams

H05H 3/06

Details (targets for producing nuclear reactions H05H 6/00)
References
Limiting references

This place does not cover:

Targets for producing nuclear reactions

H05H 6/00

Accelerating tubes (vessels or containers of electric discharge tubes with improved potential distribution over surface of vessel H01J 5/06; shields of X-ray tubes associated with vessels or containers H01J 35/16)
References
Limiting references

This place does not cover:

Vessels or containers of electric discharge tubes with improved potential distribution over surface of vessel

H01J 5/06

Shields of X-ray tubes associated with vessels or containers

H01J 35/16

{High voltage cascades, e.g. Greinacher cascade}
Definition statement

This place covers:

Electrostatic generators provided with high-voltage cascades, e.g. Greinacher cascade.

Targets for producing nuclear reactions (supports for targets or objects to be irradiated G21K 5/08 {; preparation of tritium C01B 4/00; targets, e.g. pellets for fusion reactions by laser or charged particles beam injection H05H 1/22})
Definition statement

This place covers:

Materials and devices used as a target for producing secondary particles upon impact of an impinging beam.

This subclass includes also auxiliary components of the targets, such as windows, radiation protective screens, cooling arrangements.

References
Limiting references

This place does not cover:

Pellets for fusion reactions

G21B 1/19

Arrangements for converting chemical elements by target irradiation

G21G 1/00

Recovery of isotopes from an irradiated target

G21G 1/00

Systems for treating objects by irradiation

G21K 5/00

Supports for objects to be irradiated

G21K 5/08

{Polarised targets (polarising devices, e.g. for obtaining a polarised ion beam G21K 1/16)}
Definition statement

This place covers:

Polarised targets used in quantum physics (e.g., targets for polarising neutron beams, spin-polarised thermonuclear fuels) and arrangements for their production.

References
Limiting references

This place does not cover:

Manipulation of particles by means of polarising devices

G21K 1/16

Details of devices of the types covered by groups H05H 9/00, H05H 11/00, H05H 13/00
Definition statement

This place covers:

Constructive arrangements and components of linear accelerators, magnetic induction accelerators and magnetic resonance accelerators (e.g. magnet systems, power supply systems), their auxiliary systems (e.g. beam injection systems, undulators) and irradiation systems using such accelerators.

References
Limiting references

This place does not cover:

Direct voltage accelerators

H05H 5/00

Irradiation of objects

G21K 5/00

Synonyms and Keywords

In patent documents, the following words/expressions are often used as synonyms:

  • "LINAC" and "Linear accelerator"
  • "CW" and "Continuous wave"
{Arrangements for beam delivery or irradiation (irradiation systems per se G21K 5/00)}
Definition statement

This place covers:

Systems for delivering the accelerated beam of particles to the target.

References
Limiting references

This place does not cover:

Radiation diagnosis

A61B 6/00

Gantries for radiation therapy

A61N 5/00

Product irradiation systems

G21K 5/00

Circuits or systems for supplying or feeding radio-frequency energy (radio-frequency generators H03B)
Definition statement

This place covers:

Systems for supplying microwave or radio-frequency energy to the different components and auxiliaries of the accelerator, e.g. accelerating cavities, electromagnets, particle sources.

References
Limiting references

This place does not cover:

Radio-frequency generators

H03B

Klystrons

H03B 9/04

Magnet systems {, e.g. undulators, wigglers (free-electron laser H01S 3/0903)}; Energisation thereof
Definition statement

This place covers:

All kind of magnets and superconducting magnets used in particle accelerators, e.g. for beam bunching (undulators, wigglers), focusing, bending or deflecting.

References
Limiting references

This place does not cover:

Free-electron lasers

H01S 3/0903

Informative references

Attention is drawn to the following places, which may be of interest for search:

Magnets in general

H01F

Two-beam arrangements; Multi-beam arrangements {storage rings}; Electron rings
Definition statement

This place covers:

Arrangements for storing and accelerating plural particle beams at the same time (e.g. for beam collision purposes) and for beam merging (e.g. funneling).

References
Limiting references

This place does not cover:

Beam collisioners for nuclear fusion

G21B 3/006

Arrangements for injecting particles into orbits
Definition statement

This place covers:

Systems and methods for forming and injecting particle beams into an accelerator by mechanical, electrostatic or magnetic means (e.g. ion and electron sources, pre-accelerators).

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

ECR

Electron Cyclotron Resonance

PIG

Cathodic source of light ions

EBIS

Electron-Beam Ion Source

CSD

Charge State Distribution

Arrangements for ejecting particles from orbits
Definition statement

This place covers:

Arrangements for extracting the charged particles from the accelerators, e.g. septa, stripping foils.

References
Limiting references

This place does not cover:

Arrangements for modifying the trajectory of the extracted beam (gantries)

A61K

Arrangements for varying final energy of beam
Definition statement

This place covers:

Systems and methods for varying the energy of the extracted beam, by electromagnetic or mechanical means or by emittance variation (e.g. RF cavities, stripping foils, stochastic cooling).

Vacuum chambers (H05H 5/03 takes precedence)
Definition statement

This place covers:

The vacuum chambers, cavities and resonators used in a charged particle accelerator and their auxiliary systems (e.g. vacuum pumps, cryostats).

References
Limiting references

This place does not cover:

Accelerating tubes for direct-voltage accelerators

H05H 5/03

Cavities; Resonators {(travelling-wave tubes H01J 23/18; hyperfrequency cavities in general H01P 7/04, H01P 7/06)}
References
Limiting references

This place does not cover:

Travelling-wave tubes

H01J 23/18

Informative references

Attention is drawn to the following places, which may be of interest for search:

Hyper-frequency cavities in general

H01P 7/04 , H01P 7/06

Details of linear accelerators, e.g. drift tubes (H05H 7/02 - H05H 7/20 take precedence)
Definition statement

This place covers:

Specific components and systems of linear accelerators (e.g. drift tubes, arrangements for coupling cavities, arrangements for coupling power to cavities) and of the accelerators covered by H05H 15/00.

References
Limiting references

This place does not cover:

Details of the accelerators covered by H05H 9/00 - H05H 13/10

H05H 7/00

Other details

H05H 7/02 - H05H 7/20

Informative references

Attention is drawn to the following places, which may be of interest for search:

RF supplying systems

H05H 7/02

Linear accelerators
Definition statement

This place covers:

Hadron linacs, drift-tube linacs, side-coupled cavity linacs, RF quadrupoles, lepton linacs and hybrid linacs.

References
Limiting references

This place does not cover:

DC linear accelerators

H05H 5/00

Gantries for radiotherapy

A61N 5/00

Travelling-wave linear accelerators {(travelling-wave tubes H01J 25/34)}
Definition statement

This place covers:

Systems and methods for accelerating electron beams by means of an electromagnetic wave (microwave) travelling in a tube serving as waveguide.

References
Limiting references

This place does not cover:

Travelling-wave tubes

H01J 25/34

Standing-wave linear accelerators
Definition statement

This place covers:

Linear accelerators wherein electric fields are set up as standing waves within a resonant cavity, with drift tubes suspended along the central axis.

Linear accelerators for hadron particles, e.g. protons, neutrons and ions.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

HADRON

composite particle subject to strong interaction

LINAC

Linear Accelerator

{Drift tube LINACS}
Definition statement

This place covers:

Linear accelerators with drift tubes suspended along the central axis.

{Hybrid systems}
Definition statement

This place covers:

Linear accelerators combining the features of H05H 9/042 - H05H 9/045.

{Lepton LINACS}
Definition statement

This place covers:

Linear accelerators for lepton particles, e.g. electrons.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

LEPTON

Elementary particle not subject to strong interaction

Magnetic induction accelerators, e.g. betatrons
Definition statement

This place covers:

Betatrons.

Magnetic resonance accelerators; Cyclotrons {(strophotrons, turbine tubes H01J 25/62)}
Definition statement

This place covers:

Cyclotrons, synchrotrons, synchrocyclotrons, fixed-field alternating-gradient accelerators and microtrons.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Strophotrons, turbine tubes

H01J 25/62

Methods or devices for acceleration of charged particles not otherwise provided for {, e.g. wakefield accelerators}
Definition statement

This place covers:

Systems and methods for accelerating or decelerating charged particles by means other than linear or magnetic resonance accelerators, e.g. laser pulses, resonance converters, magnetic monopole accelerators, dielectric-wall accelerators, inductive amplification of particle energy.