Trial lectures for accelerator
operators in SPrin-8--Operator’s work and training-• Overview of SPring-8• Duties of operators• Training
Japan Synchrotron Radiation Research Institute (JASRI)

SPring-8 Accelerator division
T. Ohshima
Workshop on Accelerator Operation 2003, Hayama/Tukuba, Japan

Overview of SPring8
Electron storage ring

NewSUBARU
1-1.5GeV

Synchrotron Radiation(SR) facility
44 Beamlines
Circumference 1436m

1GeV Linac

8GeV 100mA
Emittance ~3nmrad
Coupling < 0.1%

Booster
Synchrotron
1 -> 8GeVInjectors
1GeV Linac
8GeV Booster Synchrotron
NewSUBARU
SR facility :VUV~soft X-ray
Hyogo Institute of Technology

Storage ring
8GeV

Organization• Accelerator division– Linac group– Ring accelerator group– Operation &Beam Dynamics group– Control group

9 staffs
21
125– Operators

20• 4 persons * 5 teams

Operation time
6000

time(hr)

5000
down
refilltuning
user

4000
3000
2000
1000
0

1997

1998

1999

2000

2001

2002

down

26

110

57

88

87

190

refill

50

110

95

70

59

80

tuning

304

1458

1624

1815

1277

1395

user

906

2512

3275

3193

4033

3900

* Values in 2002 are tentativeOperation schedule• 9 cycles in 2002
• About 4 weeks / cycle– Briefing : every Monday and Friday morning for 15min––

Linac, booster, storage ring, beamline, New SUBARU,
safety, utility, secretary

one cycle
~24hr

~24hr

user
tuning~48hr

user
beamline
study

~5hr

user
Machinestudytuning• 3 shifts of 8 hours• Shift leader– In charge of operation of four accelerators– Assigned from accelerator staff• Number of staffs for shift
Shift leader– Day Shift( 9:0-17:0)– Evening Shift(17:0-25:0)– Owl Shift ( 1:0-9:0)

112Operator
444

Duties of operators• SR users want stable and reliable light– Keep scheduled beam injection– Watch machine status– Fast recovery from trouble

Control room

Beam injection• Storage ring
– Once /day for multi-bunch filling– Twice/day for high bunch current filling• New SUBARU– Every ~5 minutes injection at 1GeV operation• Procedure of beam injection– Broadcast information of injection– Tune the parameters of injectors• Adjust beam current, fine tune of energy,,– Start injection– Measure beam parameters• COD, betatron tune, etc– Logging• Statistics (injection charge,,)• What they did

– Logging what they do in paper logbook

When trouble occurs• Alarm program alert with voice– Please refer to A. Yamashita’s presentation• Check what happened– Please refer to Takao’s and Kodera’s presentation• Under shift leader’s instruction,
Cure the trouble by operators if possible– Ex. Large reflection from RF cavities,–
Over current of klystron modulator ,,Alarm display

• If the trouble is serious one,call group leaders responsible to the sourceof trouble and help to recover

ExampleWater leakage from insertion
deviceTraining• Carrier of operators are different– Lectures on basics of accelerator– Preparation of Operation manuals– On the job training• Newcomer works with elder one for one year
before being night shifts’ crew

Lectures on accelerator basics– Held during maintenance period– Lectured by expert– Lecture note is uploaded to brows through WEB• RF system of storage ring
• Ultra High Vacuum• Beam monitoring system• Control system of accelerator• Magnets and power supply• COD correction• What they do in apple type undulator (ID23)• Design concept of booster synchrotron• Insertion devices control• Beam line for beam diagnostics• Radiation safety on operation of accelerator• RF gun• Super conducting wiggler

Manuals• Operation manual– Divided with sub group• How to use graphical interface• Structure of each system• …

• Failure report / Trouble shooting manuals– Store what had happened and how to cureSummary• After the commissioning started in 1996,
the accelerators in SPring-8 have beenworking well.
• That is supported by the works of good
operators.
• Further efforts will be made to promote theability of operators.