Accelerator Generic Names

generic name: Domain-{Family,Device}-{Member,Component}

Domain = AMachineSystem

Machine (2 characters):

There are also devices acting on several machines at once that cannot be assigned to a particular machine, e.g. the RF master oscillator. For these we define »pseudo-machines« like

 

System (2 characters):

System defines the technical subsystem, orthogonal to the machine subdivision:
 

MA	Magnets (incl. power supplies)
DI	Diagnostics (incl. cameras, detectors, supplies)
RF	RF systems (including timing)
VA	Vacuum systems
AL	Alignment
SA	Safety

Thus the domain defines a system cell in a matrix covering the whole accelerator complex. This also corresponds to the personal responsibilities, e.g. one person might be heading the whole Booster, another one the vacuum systems in general. If there is a big problem in domain  ABOVA, the two persons responsible for Machine BO and System VA will get together. Smaller problems will be treated by the person working in domain ABOVA alone.

Family, Device, Group

Magnets: The functional magnet device contains one magnet or a chain of magnets, the cable between magnet(s) and power supply, the power supply and its controller. Controlled channels will be current, temperature, waterflow, alignment data, etc.

B	Bending magnet
Q	Quadrupole
S	Sextupole
CH	Horizontal corrector
CV	Vertical corrector
Y	Septum  (Y for the topology of uniting/separating beams)
O	Solenoid  (O for the rotational symmetry)
CS	Skew quadrupole corrector
K	Kicker
ID	Insertion device

Magnet names start with these characters, followed by more to identify their function, e.g. QLA for first matching quad to long straight section.

Diagnostics:

Diagnostic devices usually have rather long names, thus they are always called by abbreviations. The functional diagnostic device contains the component interacting with the beam and several pieces of electronics. In case of an optical transition radiation screen the hardware involved comprises the screen itself with its motor or pneumatic actuator and corresponding power supplies, a camera and perhaps some tilting mirrors with their power supplies, and the frame grabber card. Channels will be the screen status (motor position), the image taken and probably the beam diameter value, if the image processing is done at framegrabber level.
 

BPM	Beam position monitor
SM	Screen monitor (OTR and/or fluorescent)
SRM	Synchrotron radiation monitor
WCM	Wall current monitor
FCUP	Faraday cup
TUPU	Tune pick-up
PUM	Bunch purity monitor
BLM	Beam loss monitor
HS	Horizontal scraper
VS	Vertical scraper
ICT	Integrating current transformer
PCT	Parametric current transformer
FCT	Fast current transformer

RF systems:

Ring machines (booster and storage ring):

There are 5 identical RF plants, one in the booster and 4 in the storage ring, each consisting of the amplifier (integrated transmitter), containing klystron, modulator, etc., the cavity, containing tuners, and the waveguide, containing attenuators, magic-Ts etc. The plants are numbered n=0,1,2,3,4 with 0 for the booster, 1 and 2 the storage ring RF in sector 02 and 3 and 4 in sector 08.

Not yet clear where to draw the line between functional devices: One extrem would be to treat each of the 5 RF plants as a whole as one device with a long list of hardware components, the other extrem treats every little electronic box as an individual device with only one hardware piece involved.

An	Transmitter
CAVn	Cavity
WGn	Waveguide

Linac:

The linac contains two accelerating sections, three buncher sections and the thermionic gun. Since the gun uses high voltage like the sections we count it with the RF although it operates DC actually.

GUN	Thermionic gun (DC)
SBU	Subharmonic buncher (500 MHz)
PBU	Prebuncher (3 GHz)
FBU	Final buncher (3 GHz)
AS	Accelerating section

Vacuum systems:

The first family character describes the kind of device (e.g. pump), the second character specifies a type, how it works (e.g. getter pump).

C	Vacuum chamber
PG	Getter pump
VG	Gate valve
MI	Ionisation measurement
MP	Penning measurement
MQ	Quadrupole mass spectrometer
MT	Thermovac measurement

Alignment

Controllable alignment devices appear in the storage ring only: Girder mover motors to be set and position measuring devices to be read. The other machines also will have alignment data, but these will be obtained from survey and thus are read-only.

HLS	Hydrostatic levelling system
HPS	Horizontal positioning system
POMSH	Horizontal BPM position measurement
POMSV	Vertical BPM position measurement
GM	Girder mover motors

Member, Component

The third level for the machine devices usually is just a number or in case of the ring machines a descriptor containing some information on the location based on the machine's symmetry (see below). Up to now only the RF with its tree topology seems to needs a component specification:

RF systems: (n=0..4)
 

An	Amplifier	CAVn	Cavity
An-KLY	Klystron	CAVn-TULP	Tuning loop
An-FIL	Klystron filament heating	CAVn-HOMFS	Higher order mode frequency shifter
An-FOC	Klystron focussing coil	CAVn-CLRK	Cooling rack
An-IPS	Klystron ionisation pump	WGn	Waveguide
An-HVDK	High voltage deck	WGn-AT	Attenuator
An-PS	Klystron power supply	WGn-CI	Circulator
An-MOD	Modulator	WGn-CO	Coupler
An-VME	Controller	WGn-CX	Waveguide to coaxial transformer
An-FC	Fast controller	WGn-EB	E-bend
An-AMLP	Amplitude loop	WGn-HB	H-bend
An-PHLP	Phase loop	WGn-LD	Load
An-RFSW	Drive chain RF switch	WGn-MT	Magic T
An-PHST	Phase shifter station	WGn-SS	Straight section
An-PHKL	Phase shifter klystron	WGn-PP	Pumping port
An-D50W	Drive chain 50 W amplifier	WGn-PS	Phase shifter