Schedule & operation

Schedule• These few months:– Reconfigure thermal gun for positron generation– New laser system in ground laser room.• Increase pulse energy from fiber laser• Simplify the laser system

• Next summer:– Second RF-Gun with new cathode– Cryogenic Yb laser

FY2011 2012 FY2012 2013 FY2013 2014 FY2014 2015 FY2015 2016 FY2016 2017 FY2017 2018 FY2018 2019Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1

RF- Gun DAWBeamlineCathode Ir5Ce LaB6 Ir5CeLaser Nd Laser1 Nd Laser2Comissioning

RF- Gun DAW SC- QTW SC- QTW2 SC- QTW3Beamline ChicaneCathode Ir5Ce Ir5Ce New IrCe cathodeLaser Yb Laser1 5Hz 25Hz Yb Laser2(ground)Yb Laser3(Cryogenic)Comissioning Thermal Gun

Phase- 1 1nCPhase- 2 2nC low emittancePhase- 3 4nC low emittance

DesignDevelopmentInstallationOperation

GR_3

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EKB

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GR_A

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KL_A1_AKL_A1_B

RF-Gun1

RF-Gun2

加速管

Reconfiguration of A-1 injector area

Human resource and collaboration• Integration : M. Yoshida• RF-Gun : T. Natsui• Cathode : D. Sato (Titech)• Beamline : H. Kumano (Mitsubishi) , M. Chiyokura,

LINAC Accelerator group• Laser :

– Fiber laser : Z. Xian, Y. Moriai (P.A.lab)– Control : T. Natsui, N. Toyotomi (Mitsubishi)– Solid laser : R. Zhang / T. Natsui– LD and Yb:YAG : Hamamatsu Photonics– Crystal bonding / growth : Taira lab(IMS)

• Beam transport : LINAC comissioning group (LCG)• Thermal gun : T. Osawa, LINAC Accelerator group• And many advisors

– U-Osaka / RIKEN / U-Tokyo / AIST

Technology transfer to Mitsubishi operatorsNd laser system was built by Mitsubishi.

24 hour operation• Complete the simplest laser system– Reduce MTBF items

• Redundant RF-Gun and laser system– Reduce failure rate

• Required human resource : 1 week = 21 shift– Staff : 1 shift / week x 4 staffs = 4– Expert operator : 5 shift / week x 2 staffs = 10

Sum = 14 ?

• Must increase expert operators.– More 2 experts (total 4) will be required.

Considerable faults of RF-Gun

• Cavity discharge• Cathode degradation• Laser window damage

MTTR = 7 days ?

Considerable faults of laser system

• Failure rate = i i

i i i

MTTR n

MTBF MTTR n

Redundant laser system is required.

MTBF(days) MTTRdays) Number Cost/ unit Failure rate Cost/ yearSM Fiber LD 100 0.5 4 100 0.019607843 1460 Expert emergent recoverModelock down 30 0 2 0 0 0 RedundantMM Fiber LD 150 1 1 200 0.006622517 486.6667LMA Fiber LD 150 1 2 900 0.013157895 4380PCF 100 0.3 2 600 0.005964215 4380 Expert emergent recoverLD stack 231 1 3 2000 0.012820513 9480.519Yb:YAG damage 7 0 3 5 0 782.1429 AutomaticalOptics damage 30 0.3 1 20 0.00990099 243.3333 Expert emergent recoverPulsed power supply 365 0.3 5 200 0.004092769 1000 Expert emergent recoverPulse picker 365 1 4 200 0.010840108 800HV power supply 1000 0.1 4 1000 0.00039984 1460 Operator recoverTrigger 365 1 1 0 0.00273224 0DC power supply 1000 0.1 10 300 0.000999001 1095 Operator recoverControl system down 30 0.1 1 0 0.003322259 0 Operator recoverWater chiller 30 0.1 2 0 0.006622517 0 Operator recoverAir conditionar 365 7 2 500 0.036939314 1000Sum 0.134022021 26567.66 ← 2656 / year万円

(One day per week)