KEK-STF Vertical Test and Diagnostics Brief History & Future Plan Vertical Test Facility Cavity Diagnostic System Example of MHI#7 Cavity Summary of T-mapping Result Summary For V.T. of IHEP #1 Cavity 1 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 2009/12/2 Kirk

Brief History & Future Plan 2007/May Construction started Pit, Cavity hanger, Control room and etc. 2008/Mar V.T. facility completed 2008/Jul First V.T. at STF Commissioning test AES#001 cavity used (Rental from FNAL) 2008/Dec V.T. for S1-Global started MHI#5-#9 cavities used 2009/Dec V.T. for S1-Global will be finished This final test will be done at 16/Dec. 2010/Mar V.T. for S0 plan will be started MHI#10 and #11 cavities used 2009/12/2 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 2

3 New Vertical Test 2009/12/2

2nd Workshop of the IHEP 1.3GHz SRF R&D Project Status of V.T. in STF 42009/12/2

2nd Workshop of the IHEP 1.3GHz SRF R&D Project 5 T-mapping system Fish-bone structure carbon resistor 30° Pinpoint attachment 2009/12/25 Totally 352ch resistors 0.1sec sampling time

2nd Workshop of the IHEP 1.3GHz SRF R&D Project 6 X-ray-mapping system Top flange Totally 142ch PIN diodes 0.1sec sampling time Bottom flange 20 PIN diodes are attached at each iris. At the iris between #3 and #4 cell, and #6 and #7 cell, they are not attached. 2009/12/26

Best Result of MHI#1-#9 Cavities 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 72009/12/2

Final Result of MHI#1-#9 Cavities 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 8 Performance of MHI#8 and #9 was degraded! 2009/12/2

2nd Workshop of the IHEP 1.3GHz SRF R&D Project 9 Max E acc of MHI#1-#9 Cavities cable breakdown study of magnetic shield brown stains 1 st batch2 nd batch3 rd batch ? 2009/12/2

Recent problem at STF Heavy field emission After exchange for new EP acid on May Many brown stains found on the inner surface Radiation level was much higher 2009/12/2 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 10

Before exchange for new EP acid Over-range Comparison of radiation level among recent 10 V.T.s 11 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 2009/12/2 After exchange for new EP acid

Result of MHI#7 cavity at 2 nd V.T. 2009/12/2 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 12

13 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 14/Oct (Wed)10:50Installation of MHI#7 into cryostat 11:32Helium transfer starts 17:56Helium transfer finishes pass-band mode measurement and TDR check 15/Oct (Thu) 7:00cable correction 7:35Helium transfer starts 10:03Measurement starts at 4.2K 10:12Measurement finishes at 4.2K (E acc, max =8.9MV/m, P 0 =192W, power limit, no x-ray) 10:46Decompression from 4.2K to 2K 12:06Helium transfer at 2.38K 14:33Decompression restarts 17:191 st power rise at π mode (E acc, max =33.5MV/m, P 0 =246W, Radiation Limit) 19:358π/9 mode (E acc, end cell =33.3MV/m) 19:587π/9 mode (E acc, end cell =34.2MV/m) 20:246π/9 mode (E acc, end cell =33.7MV/m) 21:105π/9 mode (E acc, end cell =33.5MV/m) 21:494π/9 mode (E acc, end cell =30.1MV/m) 22:413π/9 mode (E acc, end cell =17.5MV/m) 22:592 nd power rise at π mode (E acc, max =33.6MV/m, P 0 =247W, Radiation Limit) 23:30V.T. finishes Experimental Log for MHI#7 at 2 nd V.T. 2009/12/2

Q 0 -E acc Curve for MHI nd V.T. 14 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 8.9MV/m 33.6MV/m thermal quench by defect or contamination Q t = 2.65 x → 2.58 x MV/m thermal quench by defect or contamination 2009/12/2

Radiation Level in π mode 15 2nd Workshop of the IHEP 1.3GHz SRF R&D Project process 2009/12/2

7 pass-band modes measurement 2nd Workshop of the IHEP 1.3GHz SRF R&D Project /12/2

17 cellπ8π/97π/96π/95π/94π/93π/9E acc, max 1 & & & & final state self- pulse power limit self- pulse limiting cell Cell #9 Cell #5 ? excitation of other pass-band 4π/9, 3π/9, 2π/9, π/9 8π/9, 7π/9, 6π/9 π/9Average 39.6 unit : [MV/m] E acc (on axis) per Cell 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 2009/12/2

2nd Workshop of the IHEP 1.3GHz SRF R&D Project #9 during 6, 7, 8π/9, π mode 18 π π 8π/9 7π/9 6π/9 5π/94π/9 3π/9 2009/12/2 Cell #9 was heating at 6, 7, 8π/9 and π mode.

2nd Workshop of the IHEP 1.3GHz SRF R&D Project 19 π #9 during 2 nd π mode Final state 2009/12/2

2nd Workshop of the IHEP 1.3GHz SRF R&D Project PIN Diode output at top and bottom flanges 20 π 8π/9 7π/9 6π/9 5π/9 4π/9 π Only π mode 1 st π 2 nd π 1 st π 2 nd π 3π/9 Top flange Bottom flange 2009/12/2 Lower level compared to top side Processing!

2nd Workshop of the IHEP 1.3GHz SRF R&D Project 21 1 st power mode2 nd power mode 2009/12/2 PIN Diode output at top and bottom flanges

2nd Workshop of the IHEP 1.3GHz SRF R&D Project PIN Diode output at iris region between #5 and #6 cell 22 π π 8π/9 7π/9 6π/95π/94π/9 3π/9 2009/12/2

33.6MV/m Comparison between T-mapping and X-ray nd π 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 23 T-mappingX-ray-mapping 2009/12/2 There is no correlation between them.

33.7MV/m Comparison between T-mapping and X-ray 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 24 T-mappingX-ray-mapping 2009/12/2 There is no correlation between them.

Online monitor during V.T. 2009/12/2 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 25

Online monitor for X-ray-mapping 2nd Workshop of the IHEP 1.3GHz SRF R&D Project /12/2 Low field at π modeMiddle field at π modeHigh field at π mode The display is updated every 5 seconds.

Online monitor of time trend 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 27 X-ray-mapping T-mapping 2009/12/2

Online monitor 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 28 6π/9 5π/9 2009/12/2

Summary of T-mapping result 2009/12/2 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 29

1 st nd rd pre-EP: 5μm EP1: μm EP2: 50μm H 2 O 2 +HWR+HPR EP2 : 50μm H 2 O 2 +HWR+HPR EP2 : 20μm Ethanol+HWR+HPR π, 7π/9, 5π/9, 3π/9 (27~28MV/m) 4π/9, 6π/9 (30, 31MV/m) π, 3π/9 (27, 31MV/m) 4π/9 (20MV/m) 30 π, 8π/9, 4π/9, 3π/9 (20~23MV/m) 7π/9 (29MV/m) 6π/9 (33MV/m?) 5π/9 (26MV/m) Transition of heating location for MHI#5 Hot Water Rinsing with Ultrasonic 2009/12/2 2nd Workshop of the IHEP 1.3GHz SRF R&D Project

Transition of heating location for MHI#6 1 st 4 th 6 th π (25.7MV/m) 3π/9 (35.4MV/m) π~4π/9 (20~22MV/m) 3π/9 (40MV/m) 5π/9 (35MV/m) 6π/9 (35MV/m) 4π/9, 8π/9, π (28~32MV/m) 31 pre-EP: 5μm EP1: μm EP2: 50μm H 2 O 2 +HWR+HPR EP2 : 50μm H 2 O 2 +HWR+HPR EP2 : 20μm Ethanol+HWR+HPR (before 5 th V.T.) EP2 : 20μm Ethanol+HWR+HPR 2009/12/2 2nd Workshop of the IHEP 1.3GHz SRF R&D Project

Transition of heating location for MHI#7 1 st 2 nd 32 3, 43MV/m 6, 7, 8π/9, π(17MV/m) 3π/9(31MV/m) 4π/9(27MV/m) 6~8π/9(17~19MV/m) 5π/9(25MV/m) EP2 : 20μm Degreasing(FM-20) +HWR+HPR pre-EP: 5μm EP1: 100μm EP2: 20μm Ethanol+HWR+HPR 2009/12/2 2nd Workshop of the IHEP 1.3GHz SRF R&D Project

33 5, 38MV/m 3, 4, 8π/9, 5, 3, 4, 8π/9, Transition of heating location for MHI#8 EP2 : 20μm Degreasing(FM-20) +HWR+HPR pre-EP: 5μm EP1: 100μm EP2: 20μm Ethanol+HWR+HPR 3, 4, 5, 7, 8π/9, EP2 : 20μm Degreasing(FM-20) +HWR+HPR 1 st nd rd 2009/12/2 2nd Workshop of the IHEP 1.3GHz SRF R&D Project

3, 4, 5, 7, 8π/9, 3, 1 st 7, 8π/9, 2 nd 34 Transition of heating location for MHI#9 1 st nd EP2 : 20μm Degreasing(FM-20) +HWR+HPR pre-EP: 5μm EP1: 100μm EP2: 20μm Ethanol+HWR+HPR 2009/12/2 2nd Workshop of the IHEP 1.3GHz SRF R&D Project

2009/12/2 2nd Workshop of the IHEP 1.3GHz SRF R&D Project Summary of heating location in T-mapping 35 cavity # of V.T. Cell #1Cell #2Cell #3Cell #4Cell #5Cell #6Cell #7Cell #8Cell #9 MHI#51 st 60~150 (27, 31) MHI#52 nd 180~240 (26) 120~180 (29) 252~360 (33?) 90~150 (20~23) MHI#53 rd 150~180 (27~28) 288~342 (30, 31) MHI#61 st 240~270 (35) 150~210 (26) MHI#64 th 210~300 (40) 300~342 (20~22) MHI#66 th 240~300 (35) 108~210 (36) 60~150 (28~32) MHI#71 st 60~150 (17~19) 240~330 (25) 120~210 (31) 30~120 (27) MHI#72 nd 150~240 (35, 43) 18~108 (33~34) MHI#81 st 180~252 (28) 150~198 (16~17) 210~270 (25, 27) MHI#82 nd 60~120 (27~30) 180~300 (32, 38) 108~30 (41) MHI#83 rd 270~360 (17~20) 180~270 (39) MHI#91 st 198~240 (27~29) 120~180 (39) 240~300 (25~34) MHI#92 nd 30~120 (16~18) 270~360 (40) Red : Defect or contamination Blue : Field emission Black : Unknown angle gradient

Summary New V.T. facility at STF was completed Vertical test is routinely done T-mapping system identified perfectly heating location in every V.T. X-ray-mapping system is useful for evaluation of field emission Online monitor system is recently introduced V.T. for S1-Global will be finished in 16/Dec V.T. for S0 plan will be started from Mar/ /12/2 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 36

For V.T. of IHEP #1 Cavity T-mapping? X-ray-mapping? Radiation monitorO.K. Other monitorO.K. CERNOX, electron probe, helium status and etc. Online monitorO.K. Data analysis? 2009/12/2 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 37

2009/12/2 2nd Workshop of the IHEP 1.3GHz SRF R&D Project 38 Thank you for your attention! This collaboration project will be certainly successful!