The 7th International Workshop on Accelerator Operation

Training syllabus for RIKENNISHINA Center

Tadashi FUJINAWA

RI Beam Factory （RIBF)

SCRITSAMURAIRILAC-2
SRC

SHARAQSRC is the World’s Biggest and Most PowerfulComparative table for large
size Cyclotrons

Osaka Univ

Michigan
NSCL

Ring Cyclotron Ring Cyclotron Ring Cyclotron

AVF

RIKEN IRC

Type

SRC

K-Value

950

2500

400

1200

Sectornumber46

63(hill)

Magnetic field(Tesla)

1.9

4

1.75

3一5

Normalconductor

Superconductor

Normalconductor

Frequency(MHz)

18一38

23一46

30一52

9一27

Weight (ton)

2400

84002200240

Main coil

Superconductor

DAIBUTSU of Nara (Big Buddha)• The giant statueof Buddha in Nara.
• Big but not the strongest.

World Baseball Classic• 2005 champion• 2009 champion• Best not the biggest

Yamato class battleshipBattleship YAMATO class vs. IOWA class

IOWA
Standard displacement(ton)

YAMATO

48,50064,000Board armer

(mm)

325

410

Gun turret amer

(mm)

495

650

Bore of Main gun

(cm)

40.64

46.0

Cannon ball

(ton)

1.2

1.5

CannonballIowa class 1.2ｔ

Yamato class 1.5ｔ

No. of Freshman in 2009

• 40 experimenters• Operators1) Accelerator 2 out of 182) CGS
3 out of 103) He chillers 1 out of 8

Syllabus• Legally required for every one:
1. Radiation worker for radiation control area

2. Guidance training
3. Special training for low voltage electricalhandling(Not more than 600V AC or 750V DC)

Special training ｆｏｒ low voltage handlingSpecialized training• Medium voltage electrical handling (6.6kV)

25ｋAVCB• Liquid nitrogen handling• Machine tool operation• Scaffolding work

Crane• Crane operation and sling work
1.Not for crane of less than 1 ton
2.Special training for crane less than
5 ton
3.Skill training for pendant crane
4.License for overhead crane (wireless)Skill training for pendant crane

OJT for operators• Senior associate trains the freshman• Senior and freshman make up a pair
• Classroom lectures for the freshman

Actual trouble case 1• Cogeneration (CGS) was not in
operation when lightning struck(CGS works only when thermal loadincreases)
1)Operator pushed the start button of
CGS when thundercloud approached
but CGS started to turn only .

（Gas turbine generator needs enoughturning before start）
2)The manual was revised so that CGS
will start to turn when thundercloudappears on the monitor display in thecontrol room3)With this revision, CGS now works as
UPS for important loads

Case-2• CGS control rooms monitored instantvoltage drop by under voltage relay(27)there are 4 control rooms
1)When 27 the alarm went off, CGS operator
only reset the relay2)After one hour,He in small He refrigerators
started to evaporate and the operator ofHe chiller recognized trouble• The manual was revised so that when
instant voltage drop occurs, operator
must call all control rooms to inform.
• When informed, the operators should
check the range of defense

Conclusion• Safety first !
• Up to now, there was no accident that
led to injury or deathEXTRA• RILAC-2 ： New Injector, Riken ion linac• SCRIT : Self-Confining Radioactive Ion
Target• SAMURAI: Superconducting Analyzer
for Multi-particle from Radioactive
Isotope• SHARAQ: Spectroscopy of hadronicsystem with radioactive quantum beam