cyclotron
Enable an agent to recognise a cyclotron, assess its beam-production readiness, and identify actions permitted by its configuration, operating limits and authorisations.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an agent to recognise a cyclotron, assess its beam-production readiness, and identify actions permitted by its configuration, operating limits and authorisations.
A cyclotron is a cyclic particle accelerator in which a magnetic field bends charged particles through repeated orbits while a radiofrequency electric field accelerates them across gaps, generally increasing their orbital radius as their momentum rises.
It can be Classify a candidate accelerator and identify evidence missing from its cyclotron designation.; Compare a requested particle beam with documented machine capability and authorised operating limits.; Assess readiness from vacuum, magnet, radiofrequency, cooling and interlock evidence.; Associate beam degradation or trips with diagnostics and approved investigation procedures.; Identify maintenance dependencies, consumables and conditions for authorised access.; Trace a delivered beam setting to its configuration, diagnostics and receiving interface..
Distinguishing features
Uses magnetic bending to return charged particles repeatedly through radiofrequency accelerating regions, distinguishing it from a linear accelerator.
The equilibrium orbit radius generally increases during acceleration, distinguishing its basic geometry from a synchrotron with an approximately fixed reference orbit.
Recognition requires the relationship between orbit frequency and accelerating-field timing; circular particle motion alone does not establish that a device is a cyclotron.
Classical, isochronous and synchrocyclotron designs require separate synchronisation descriptions; fixed radiofrequency operation must not be imposed on every variant.
Accelerates a circulating charged-particle beam; a radioactive source or an X-ray tube alone does not meet the identity test.
Scope
+ Cyclotron identity, design variants and boundaries of the accelerator assembly
+ Magnetic guidance, radiofrequency acceleration and synchronisation
+ Particle generation, injection, circulating beam and extraction
+ Beam capability, performance measurements and operating envelopes
+ Machine protection, radiation-related interlocks and maintenance readiness
- Complete accelerator facilities, buildings and shielding structures
- Independent downstream beamlines and experimental instruments
- Radionuclide production chemistry, product release and radiopharmaceutical preparation
- Clinical treatment planning and patient dose delivery
- General particle physics and accelerator theory beyond cyclotron recognition and operation
- Manufacturer product families and individual asset records as separate catalogue kinds
Characteristics
- Cyclotron design class
- Classical cyclotron, isochronous cyclotron, synchrocyclotron, or documented specialist variant Determines how magnetic geometry and accelerating-field timing maintain synchronisation.
- Accelerated particle and charge state
- Particle or ion species, isotope where relevant, and signed charge state in elementary-charge units Constrains source compatibility, magnetic rigidity, acceleration settings and extraction options.
- Beam energy
- MeV per particle or MeV/u, with location, species and operating mode Defines beam capability without confusing total ion energy with energy per nucleon.
- Beam current
- µA or mA, identifying circulating or extracted beam and average or peak value Supports assessment of delivered intensity, losses and thermal loading.
- Magnetic field configuration
- T, with spatial field map, magnet excitation and configuration reference A single field value cannot establish orbit guidance or focusing suitability.
- Radiofrequency programme
- MHz, frequency range or time programme, harmonic number and accelerating voltage in kV Records the conditions required for repeated acceleration at the intended particle timing.
- Beam time structure
- Documented macroscopic continuous or pulsed mode, with bunch structure and duty factor Prevents average current from concealing peak loading and timing requirements.
- Extraction method
- Stripping, electrostatic or other documented extraction; internal-target operation where applicable Determines delivery interfaces, consumables and important loss mechanisms.
- Acceleration-region vacuum
- Pa or mbar, with gauge location, measurement time and operating condition Supports evaluation of beam interaction with residual gas and equipment readiness.
- Machine readiness
- Shutdown, service access, conditioning, ready, beam enabled, inhibited or faulted, using local state definitions Separates equipment availability from permission to generate or deliver beam.
- Authorised operating envelope
- Links to approved species, energy, current, destination, protection settings and applicable authorisations Distinguishes achievable machine performance from permitted operation.
- Installation envelope
- Dimensions in m and mass in kg or t, identifying accelerator-only versus integrated shielding boundaries Supports installation and access assessment without conflating the machine with the facility.
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 18 findings · 29 questions.
Cyclotron identity Establishes the acceleration architecture and the boundary of the thing being represented.
Circular geometry or an accelerator label alone cannot establish cyclotron identity or variant.
Acceleration architecture
Identifies orbit development and the means of sustaining acceleration.
Cyclotron recognition
Record evidence of repeated radiofrequency acceleration on magnetically guided orbits whose equilibrium radius generally grows with energy.
- What documented orbit and accelerating-field arrangement establishes that this device is a cyclotron? definition
- What distinguishes its architecture from a synchrotron, betatron or other recirculating accelerator? boundary
Variant and assembly
Separates cyclotron design classes from product and installation particulars.
Design and interface boundary
Record the synchronisation variant and which source, extraction and auxiliary assemblies belong to the cyclotron.
- Which cyclotron variant is documented, and which design evidence supports that classification? provenance
- Where does the cyclotron assembly end and an independent injector, beamline, target system or facility begin? boundary
Magnetic and RF synchronisation Connects orbit guidance and focusing with radiofrequency timing and energy gain.
Cyclotron performance depends on the coordinated magnetic and accelerating-field configuration.
Orbit guidance and focusing
Records the magnetic conditions supporting stable acceleration.
Magnetic operating configuration
Identify the field configuration, focusing arrangement and magnet state required for a supported beam mode.
- Which field map and magnet configuration apply to the selected species and energy? provenance
- Which measured magnet conditions and documented tolerances establish readiness for this mode? measurement
RF timing and acceleration
Records how accelerating voltage remains appropriately timed to particle passages.
Synchronisation programme
Represent frequency, harmonic, phase and voltage settings, including any time variation required by the design.
- How does this design maintain synchronisation as particle energy increases? definition
- Which RF measurements and acceptance limits must be satisfied before the documented beam mode is enabled? measurement
Particle path and delivery Follows particles from their source through capture and acceleration to extraction or an internal target.
Source compatibility, capture and extraction determine which useful beams a cyclotron can actually supply.
Source, injection and capture
Describes particle supply and entry into accelerating trajectories.
Particle supply compatibility
Record supported species and charge states, source placement and the injection or central-region arrangement.
- Which particle species and charge states are supported by the installed source and capture arrangement? definition
- What measurements distinguish inadequate source output from poor injection or capture? measurement
Extraction and destination
Defines how accelerated particles leave their circulating orbit and reach a receiving system.
Beam handoff
Record the extraction mechanism or internal-target mode and the accepted beam conditions at the delivery boundary.
- Which extraction or internal-target arrangement applies, and does it change the particle charge state? definition
- Which receiving-system readiness signals and beam limits must be satisfied before delivery? action
Beam performance and diagnostics Makes beam capability and degradation assessable from appropriately located measurements.
Nominal energy and current do not establish delivered beam quality or acceptable losses.
Qualified beam envelope
Records demonstrated beam modes and the meaning of their reported performance.
Beam capability evidence
Associate energy, current, time structure and relevant quality measures with a species, location and qualification record.
- What energy and current combinations have been demonstrated for each supported species and destination? measurement
- Where were those quantities measured, and do they describe extracted or circulating beam and average or peak values? boundary
Loss and stability assessment
Connects beam diagnostics with departures from qualified operation.
Beam degradation evidence
Record transmission, loss indications and stability trends with diagnostic calibration and interpretation limits.
- Which diagnostics reveal capture loss, extraction loss, energy drift or unstable delivered current? measurement
- Which observed deviations require beam inhibition or an approved diagnostic procedure? action
Protected operation and maintenance Connects machine services, access conditions and protection evidence to permitted actions.
A cyclotron can be technically operable while access, beam generation or maintenance remains unauthorised.
Services and maintenance readiness
Records dependencies that sustain vacuum, fields, thermal control and extraction reliability.
Support-system condition
Track vacuum, cooling, electrical supplies, applicable cryogenic services and design-specific wear items.
- Which service measurements and equipment states are prerequisites for the selected operating mode? measurement
- Which source components, extraction foils or other installed consumables require inspection or replacement under approved procedures? action
Protection and authorisation
Records the evidence governing beam permission, fault recovery and maintenance access.
Permitted state transitions
Associate operating transitions with interlock status, personnel authority, radiation survey requirements and applicable regulatory records.
- Which verified interlocks and authorisations permit beam enablement, fault reset or service access? action
- Which jurisdictional requirements, standards and issuing bodies govern this installation, and where is compliance evidence recorded? provenance
- What survey, cooldown and energy-isolation evidence is required before work on potentially activated components? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- The listed kinds overlap: one machine can be isochronous, superconducting and designed for negative ions.
- The numerical ranges describe selected common applications and designs, not limits of the cyclotron class; heavy-ion energies are often specified in MeV per nucleon.
- This is recall without source verification; applicable regulations and installation-specific performance require checking.
- Which of these check these first hold for the sense of cyclotron this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Classical fixed-frequency cyclotron
- Isochronous cyclotron
- Synchrocyclotron
- Separated-sector cyclotron
- Superconducting cyclotron
- Negative-ion cyclotron
- Which of these kinds and varieties hold for the sense of cyclotron this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- IAEA General Safety Requirements Part 3 (GSR Part 3), Radiation Protection and Safety of Radiation Sources: International Basic Safety Standards.
- National radiation-protection and accelerator-licensing requirements imposed by the competent regulatory authority; requirements depend on jurisdiction and intended use.
- Which of these standards and regulation hold for the sense of cyclotron this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Production of medical radionuclides, including fluorine-18 for positron emission tomography.
- Acceleration of protons for radiotherapy.
- Nuclear-physics experiments using proton and ion beams.
- Irradiation of materials and electronic components for radiation-effects studies.
- Production of research and industrial radionuclides.
- Which of these real-world use hold for the sense of cyclotron this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Extracted proton kinetic energy in compact medical-isotope cyclotrons - Approximately 10-30 - MeV
- Proton kinetic energy supplied by cyclotrons for proton therapy - Approximately 230-250 before downstream energy adjustment - MeV
- Main magnetic-field strength in conventional compact cyclotrons - Approximately 1-2; superconducting designs can operate substantially higher - T
- Which of these typical measurements hold for the sense of cyclotron this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Prompt ionizing radiation, including secondary neutrons, requires shielding, controlled access and functioning beam interlocks.
- Activation of targets and accelerator components creates residual radiation hazards after the beam is switched off.
- Vacuum degradation, radiofrequency faults or magnetic-field errors can destabilize acceleration and cause beam loss and local heating.
- Target-window or cooling-system failure can damage targets and release radioactive material.
- High voltages, strong magnetic fields and, in superconducting machines, cryogenic systems create electrical, magnetic and oxygen-displacement hazards.
- Which of these failure modes and hazards hold for the sense of cyclotron this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Accelerator authorization, radiation-worker protection and radioactive-waste requirements vary by jurisdiction.
- Radionuclides produced for patient use are also subject to regional pharmaceutical manufacturing and quality requirements.
- Which of these regional variation hold for the sense of cyclotron this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Particle accelerator - The broader class includes linear and cyclic machines; a cyclotron uses repeated magnetically curved orbits with radiofrequency acceleration and generally increasing orbital radius.
- Synchrotron - A synchrotron keeps the beam near a fixed reference orbit by varying the bending field with particle momentum; a cyclotron generally uses a time-independent bending field and increasing orbital radius.
- Linear accelerator - A linear accelerator accelerates particles along a substantially straight path rather than repeatedly circulating them through the acceleration region.
- Betatron - A betatron accelerates electrons through the electric field induced by changing magnetic flux, rather than through cyclotron-style radiofrequency accelerating gaps.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of cyclotron this model covers, and on what evidence? provenance
What the second pass must settle
- Does the existing world-model catalogue already cover cyclotrons or an accelerator model that should be extended or linked instead of duplicated?
- Which specialist cyclotron variants require additional distinctions beyond classical, isochronous and synchrocyclotron designs?
- Which authoritative sources establish representative energy, current, dimensions and mass ranges for each major cyclotron application and design class?
- Which standards, issuing bodies and licensing requirements apply across intended jurisdictions and uses, and which are installation-specific?
- Which diagnostic thresholds, component failure modes and maintenance criteria are supported by manufacturer documentation or operating evidence rather than transferable assumptions?