Skip over navigation
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 subclass/group 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 relevant to classification in this subclass
This subclass/group does not cover:
Nuclear fusion reactors
Ion beam tubes
Gas-filled discharge tubes for surface treatments
Mass spectrometers
Producing X-rays involving plasma generation
Informative references
Attention is drawn to the following places, which may be of interest for search:
Atomic clocks
Obtaining neutrons from radioactive sources
Radioactive neutron sources
Techniques for handling particles or ionising radiation not otherwise provided for; Irradiation devices; Gamma ray or X-ray microscopes
Lasers
Magnetohydrodynamic generators
Frequency regulation by comparison with a reference frequency determined by energy levels of molecules, atoms, or subatomic particles
Generating plasma; Handling plasma
Definition statement
This subclass/group 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 relevant to classification in this group
This subclass/group does not cover:
Nuclear fusion reactors
Discharge vessels for exposing objects to the discharge
{Investigating plasma, e.g. degree of ionisation (electron temperature) }
Definition statement
This subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Measuring the arc parameters in a plasma arc torch
{by using photoelectric means (H05H 1/0031 to H05H 1/0043 take precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Investigating by interferrometry
Investigating by spectrometry
Investigating by using infra-red or ultra-violet radiation
{by spectrometry (see G01N 3/00) }
References relevant to classification in this group
This subclass/group does not cover:
Mass spectrometry
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
{by using X-rays or alpha rays (see G01N 23/00) }
References relevant to classification in this group
This subclass/group does not cover:
Investigating materials by particle radiation
{by using neutrons (see G01N 23/00) }
References relevant to classification in this group
This subclass/group does not cover:
Investigating materials by neutron radiation
{by using microwaves (see G01N23/34) }
References relevant to classification in this group
This subclass/group does not cover:
Investigating materials by use of microwaves
{by thermal means (see G01N 25/00) }
References relevant to classification in this group
This subclass/group does not cover:
Investigating materials by use of thermal means
{by electric means (see G01N 27/00, G01R) }
References relevant to classification in this group
This subclass/group does not cover:
Investigating materials by use of electric means
{by magnetic means (see G01N 27/00, G01R) }
References relevant to classification in this group
This subclass/group does not cover:
Investigating materials by use of magnetic means
{by acoustic, e.g. ultrasonic means (see G01N 29/02) }
References relevant to classification in this group
This subclass/group does not cover:
Investigating materials by use of ultrasonic waves
Arrangements for confining plasma by electric or magnetic fields; Arrangements for heating plasma ( {G21B 1/00 takes precedence;} electron optics H01J)
Definition statement
This subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Closed discharge vessels for plasma treatment of objects exposed to the discharge
using cusp configuration (H05H 1/14 takes precedence)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Plasma containment vessels with magnetic mirrors
wherein the containment vessel forms a closed or nearly closed loop { (G21B 1/05 takes precedence) }
Definition statement
This subclass/group covers:

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

Relationship between large subject matter areas

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

References relevant to classification in this group
This subclass/group does not cover:
Field Reversed Confinement nuclear reactors
Stellarator nuclear reactors
Tokamak nuclear reactors
wherein the containment vessel is straight and has magnetic mirrors {electron mirrors G21K1/08B}
References relevant to classification in this group
This subclass/group does not cover:
Electron mirrors
using externally-applied electric and magnetic field
Definition statement
This subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Discharge vessels in which objects are exposed to the discharge
wherein the field oscillate at very high frequency, e.g. in the microwave range {e.g. using cyclotron resonance}
Definition statement
This subclass/group 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 relevant to classification in this group
This subclass/group does not cover:
Discharge vessels operated at RF or microwave frequency, in which objects are exposed to the discharge
Ohmic heating
Definition statement
This subclass/group 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 relevant to classification in this group
This subclass/group does not cover:
Nuclear fusion reactors
for injection heating { (G21B 1/15 takes precedence) }
Definition statement
This subclass/group 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.

media1.jpg

References relevant to classification in this group
This subclass/group does not cover:
Nuclear fusion reactors
Generating plasma { (gas-filled discharge reactors H01J 37/32; nuclear fusion reactors G21B 1/00; ohmic heating H05H 1/20; injection heating H05H 1/22) }
Definition statement
This subclass/group 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.
Relationship between large subject matter areas

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 to 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 relevant to classification in this group
This subclass/group does not cover:
Nuclear fusion reactors
Ohmic heating
Injection heating
Gas-filled discharge tubes for surface treatments
{ Dielectric barrier discharges}
Definition statement
This subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Dielectric-barrier discharges in gas-filled discharge tubes
{ Acoustic pressure discharge}
Definition statement
This subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Plasma generated by shock-waves
Glossary of terms
In this subclass/group, 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 { (metal working with constricted arc B23K 10/00, H05H10/02; metal spraying B05B 7/18, B05B 7/20) }
Definition statement
This subclass/group 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.
Relationship between large subject matter areas

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

References relevant to classification in this group
This subclass/group does not cover:
Devices external to, and connected to, the plasma generating torch.
Generation of plasma by RF or microwaves
Generation of plasma in a gas-filled tube
Informative references
Attention is drawn to the following places, which may be of interest for search:
Metal spraying
Metal working with constricted arc
Cooling arrangements
Definition statement
This subclass/group 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 subclass/group 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 relevant to classification in this group
This subclass/group does not cover:
Cooling arrangements
Arrangements for arc stabilization by means of externally applied magnetic fields
Informative references
Attention is drawn to the following places, which may be of interest for search:
Mass spectrometry
using an arc (H05H 1/28 takes precedence)
Definition statement
This subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Devices external to, and connected to, the plasma generating torch
Generation of plasma by RF or microwaves
Generation of plasma in a gas-filled tube
Informative references
Attention is drawn to the following places, which may be of interest for search:
Metal spraying
Details, e.g. electrodes, nozzles {cf. B23K 9/24}
Definition statement
This subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Features related to welding or cutting electrodes
Circuits for supplying power to the torch
{Arc stabilising or constricting arrangements, e.g. by an additional gas flow (by externally applied magnetic fieldH05H 1/40; by using powders or liquidsH05H 1/42; using coaxial protecting fluidH05H 1/341) }
Definition statement
This subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Arrangements providing protecting fluids coaxial with the plasma jet
Arrangements for arc stabilization by means of externally applied magnetic fields
{using coaxial protecting fluid (arc stabilising or constricting arrangementsH05H 1/3405; introducing materials into the plasmaH05H 1/42) }
Definition statement
This subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Arrangements for controlling the plasma jet
Circuit arrangements (H05H 1/38 ,H05H 1/40 take precedence)
Definition statement
This subclass/group covers:

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

Relationship between large subject matter areas

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 relevant to classification in this group
This subclass/group does not cover:
Guiding or centering of electrodes
Applied magnetic fields, e.g. for fucusing or rotating the arc
Circuits for arc welding systems
Guiding or centering of electrodes
Definition statement
This subclass/group covers:

Systems for guiding consumable electrodes in the torch.

References relevant to classification in this group
This subclass/group does not cover:
Automatic systems for feeding consumable electrodes to the torch
using applied magnetic fields, e.g. for fucusing or rotating the arc {cf. B23K 9/08, B23K9/06C5}
Definition statement
This subclass/group covers:

Arrangements for controlling the discharge generating arc with magnetic means.

References relevant to classification in this group
This subclass/group does not cover:
Circuits for magnetic control of the arc in arc welding systems
Arrangements for controlling the discharge generating arc with mechanical means
with provision for introducing materials into the plasma, e.g. powder, liquid (electrostatic spraying, spraying apparatus with means for charging the spray electrically B05B 5/00) {cf. B23K 9/324, B05B 7/22; arc stabilising or constricting arrangements H05H 1/3405; coaxial protecting fluids H05H 1/341}
Definition statement
This subclass/group 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 relevant to classification in this group
This subclass/group does not cover:
Electrostatic spraying apparatuses
Devices for supplying a welding powder
using applied electromagnetic fields, e.g. high frequency or microwave energy (H05H 1/26 takes precedence)
Definition statement
This subclass/group covers:
  • Plasma systems, other than torches, for treatment of objects, wherein plasma is generated by applied electromagnetic fields, e.g. microwaves, radiofrequency;
  • Microplasma systems.
Relationship between large subject matter areas

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

References relevant to classification in this group
This subclass/group does not cover:
Plasma torches
Plasma devices using an arc
Dielectric barrier discharge devices
Informative references
Attention is drawn to the following places, which may be of interest for search:
Discharge tubes with provision for introducing objects or material to be exposed to the discharge
using an arc (H05H 1/26 takes precedence)
Definition statement
This subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Plasma torches
Systems with plasma generated by EM fields
Corona discharges
Definition statement
This subclass/group 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 relevant to classification in this group
This subclass/group does not cover:
Dielectric barrier discharge devices
and using applied magnetic fields, e.g. for focusing or rotating the arc
References relevant to classification in this group
This subclass/group does not cover:
Torches where plasma is generated by applied EM fields
Controlling the arc by EM fields
using exploding wires or spark gaps (H05H 1/26 takes precedence; spark gaps in general H01T)
Definition statement
This subclass/group covers:

Systems using local plasma generation for specific applications.

References relevant to classification in this group
This subclass/group does not cover:
Plasma torches
Informative references
Attention is drawn to the following places, which may be of interest for search:
Spark gaps in general
Plasma accelerators
Definition statement
This subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Ion thrusters
Electron sources for spectroscopy
Ion sources for spectroscopy
Ion sources for ion beam tubes
Production or acceleration of neutral particle beams, e.g. molecular or atomic beams
Definition statement
This subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
X-ray or gamma detectors
Neutron detectors
Manipulation of neutral molecules by optical means
Irradiation devices
Charge exchange devices
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 subclass/group 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 relevant to classification in this group
This subclass/group does not cover:
Molecular beams for analysing or investigating materials
Optical traps
Atomic clocks
Charge exchange devices
Polarising devices
Cathodic sputtering
Beam masers
Neutron generation
Acceleration by electromagnetic wave pressure
Definition statement
This subclass/group 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 relevant to classification in this group
This subclass/group does not cover:
Use of photons for propulsive thrust
Manipulation of neutral molecules by optical means
Handling charged particles
Generating neutron beams (targets for producing nuclear reactions H05H 6/00; neutron sources G21G 4/02)
Definition statement
This subclass/group 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 relevant to classification in this group
This subclass/group does not cover:
Targets for producing nuclear reactions
Radioactive neutron sources
Neutron generation in fission nuclear reactors
Neutron generation by low-temperature nuclear fusion
Neutron prospection and detection
Radiation detectors
Direct voltage accelerators; Accelerators using single pulses (H05H 3/06 takes precedence)
References relevant to classification in this group
This subclass/group does not cover:
Generating neutron beams
Details (targets for producing nuclear reactions H05H 6/00)
References relevant to classification in this group
This subclass/group does not cover:
Targets for producing nuclear reactions
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 relevant to classification in this group
This subclass/group does not cover:
Vessels or containers of electric discharge tubes with improved potential distribution over surface of vessel
Shields of X-ray tubes associated with vessels or containers
{ High voltage cascades, e.g. Greinacher cascade}
Definition statement
This subclass/group 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 subclass/group 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 relevant to classification in this group
This subclass/group does not cover:
Systems for treating objects by irradiation
Supports for objects to be irradiated
Pellets for fusion reactions
Arrangements for converting chemical elements by target irradiation
Recovery of isotopes from an irradiated target
{Polarised targets (polarising devices, e.g. for obtaining a polarised ion beam G21K 1/16) }
Definition statement
This subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Manipulation of particles by means of polarising devices
Details of devices of the types covered by groups H05H 9/00, H05H 11/00, H05H 13/00
Definition statement
This subclass/group 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 relevant to classification in this group
This subclass/group does not cover:
Irradiation of objects
Direct voltage accelerators
Synonyms and Keywords

In patent documents the following expressions/words 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 subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Gantries for radiation therapy
Radiation diagnosis
Product irradiation systems
Circuits or systems for supplying or feeding radio-frequency energy (radio-frequency generators H03B)
Definition statement
This subclass/group 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 relevant to classification in this group
This subclass/group does not cover:
Radio-frequency generators
Klystrons
Magnet systems {e.g. undulators, wigglers (free-electron laser H01S 3/0903) } ; Energisation thereof
Definition statement
This subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Free-electron lasers
Informative references
Attention is drawn to the following places, which may be of interest for search:
Magnets in general
Two-beam arrangements; Multi-beam arrangements {storage rings} ; Electron rings
Definition statement
This subclass/group 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 relevant to classification in this group
This subclass/group does not cover:
Beam collisioners for nuclear fusion
Arrangements for injecting particles into orbits
Definition statement
This subclass/group 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 subclass/group, 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 subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Arrangements for modifying the trajectory of the extracted beam (gantries)
Arrangements for varying final energy of beam
Definition statement
This subclass/group 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 subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Accelerating tubes for direct-voltage accelerators
Cavities; Resonators { (travelling-wave tubes H01J 23/18; hyperfrequency cavities in general H01P 7/04, H01P 7/06) }
References relevant to classification in this group
This subclass/group does not cover:
Travelling-wave tubes
Informative references
Attention is drawn to the following places, which may be of interest for search:
Hyper-frequency cavities in general
Details of linear accelerators, e.g. drift tubes (H05H 7/02 to H05H 7/20 take precedence)
Definition statement
This subclass/group 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 relevant to classification in this group
This subclass/group does not cover:
Details of the accelerators covered by H05H 9/00 to H05H 13/10
Other details
Informative references
Attention is drawn to the following places, which may be of interest for search:
RF supplying systems
Linear accelerators
Definition statement
This subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Gantries for radiotherapy
DC linear accelerators
Travelling-wave linear accelerators {travelling-wave tubes H01J 25/34}
Definition statement
This subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Travelling-wave tubes
Standing-wave linear accelerators
Definition statement
This subclass/group 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 subclass/group, 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 subclass/group covers:

Linear accelerators with drift tubes suspended along the central axis.

{ Hybrid systems}
Definition statement
This subclass/group covers:

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

{ Lepton LINACS}
Definition statement
This subclass/group covers:

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

Glossary of terms
In this subclass/group, 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 subclass/group covers:

Betatrons.

Magnetic resonance accelerators; Cyclotrons { (strophotrons, turbine tubes H01J 25/62) }
Definition statement
This subclass/group covers:

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

Informative references
Attention is drawn to the following places, which may be of interest for search:
Strophotrons, turbine tubes
Methods or devices for acceleration of charged particles not otherwise provided for
Definition statement
This subclass/group 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.

This page is owned by Office of Patent Classification.
Last Modified: 10/11/2013