1. Cryomodule Performance in FLASH and XFEL
TESLA Technology Collaboration (TTC) Meeting, February 28 - March , Milano, Italy
Denis Kostin, MHF-SL, DESY.
Cryomodule Performance in FLASH and XFEL
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2. Cryomodule Preformance: CMTB Cryomodule Performance: FLASH Summary
Overview
Module Test Stand CMTB
Cryomodule Preformance: CMTB
Cryomodule Performance: FLASH
Summary
Denis Kostin, MHF-SL, DESY TESLA Technology Collaboration (TTC) Meeting, February 28 - March , Milano, Italy

3. Cryo Module Test Bench
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Denis Kostin, MHF-SL, DESY TESLA Technology Collaboration (TTC) Meeting, February 28 - March , Milano, Italy

4. RF Couplers Warm Conditioning Time
coupler warm parts problems, see another talk
Denis Kostin, MHF-SL, DESY TESLA Technology Collaboration (TTC) Meeting, February 28 - March , Milano, Italy

5. Module Test Results: PXFEL1 (1)
PXFEL1 module was installed in the FLASH linac.
Denis Kostin, MHF-SL, DESY TESLA Technology Collaboration (TTC) Meeting, February 28 - March , Milano, Italy

6. Module Test Results: PXFEL1 (2)
Flat-top pulse μs operation at 10 Hz
Denis Kostin, MHF-SL, DESY TESLA Technology Collaboration (TTC) Meeting, February 28 - March , Milano, Italy

7. Module Test Results: PXFEL1 (3)
Module Field Emission vs Accelerating Gradient
RF power coupler dynamic losses
measured (CMTB)
XFEL specification
RF power, kW
120
230
200
4K losses, W
0.1
0.26
0.5
70K losses, W
2.5
3.75
6.0
Denis Kostin, MHF-SL, DESY TESLA Technology Collaboration (TTC) Meeting, February 28 - March , Milano, Italy

8. Module Test Results: PXFEL2 (1)
PXFEL2 module was diassembled
and reassembled.
Denis Kostin, MHF-SL, DESY TESLA Technology Collaboration (TTC) Meeting, February 28 - March , Milano, Italy

9. Module Test Results: PXFEL2 (2)
Denis Kostin, MHF-SL, DESY TESLA Technology Collaboration (TTC) Meeting, February 28 - March , Milano, Italy

10. Module Test Results: PXFEL3 (1)
PXFEL3 module was diassembled,
cavities are currently being tested separately.
Denis Kostin, MHF-SL, DESY TESLA Technology Collaboration (TTC) Meeting, February 28 - March , Milano, Italy

11. Module Test Results: PXFEL3 (2)
cavities 3 and 6 have high cryo-losses,
in the horizontal test after disassembly
both cavities have high cryo-losses.
Denis Kostin, MHF-SL, DESY TESLA Technology Collaboration (TTC) Meeting, February 28 - March , Milano, Italy

12. Module 3*** / ACC1 Test in FLASH
Denis Kostin, MHF-SL, DESY TESLA Technology Collaboration (TTC) Meeting, February 28 - March , Milano, Italy

13. Module Test Results: FLASH Module 3*** (1)
Stable operation at 21MV/m,
160kW/coupler
1st quench: cavity 1 at 22MV/m
Denis Kostin, MHF-SL, DESY TESLA Technology Collaboration (TTC) Meeting, February 28 - March , Milano, Italy

14. Module Test Results: FLASH Module 3*** (2)
Denis Kostin, MHF-SL, DESY TESLA Technology Collaboration (TTC) Meeting, February 28 - March , Milano, Italy

15. Modules @ FLASH LINAC (1)
ACC1
FLASH
ACC3
CMTB
170 MeV
210 MeV
ACC2
FLASH
170 MeV
7 Modules are used now at FLASH LINAC at DESY. 3 modules were tested at FLASH and 4 modules were tested at CMTB facility.
Denis Kostin, MHF-SL, DESY TESLA Technology Collaboration (TTC) Meeting, February 28 - March , Milano, Italy

16. Modules @ FLASH LINAC (2)
ACC4
FLASH
ACC6
CMTB
190 MeV
220 MeV
ACC5
CMTB
ACC7
CMTB
210 MeV
240 MeV
Denis Kostin, MHF-SL, DESY TESLA Technology Collaboration (TTC) Meeting, February 28 - March , Milano, Italy

17. Summary
9 SRF modules (including one 3.9 GHz module) tested until now on the Cryo Module Test Bench (CMTB) at DESY. XFEL Accelerating Module Test Facility (AMTF) is under construction.
7 superconducting accelerating modules are used now in the FLASH LINAC at DESY. 3 modules were tested at FLASH and 4 modules were tested at CMTB facility. FLASH linac reached 1.3 GeV goal.
First three XFEL prototype modules PXFEL1,2,3 were tested at module test stand CMTB at DESY. Coupler and cavity conditioning procedure was done with PXFEL modules.
In PXFEL1 cavities gradients from 27 to 36 MV/m are reached, module operation with average gradient of 30 MV/m using tailored RF power distribution is possible. PXFEL1 is used in FLASH (ACC7). PXFEL2 and PXFEL3 modules suffered from some cavities degradation and will be reassembled.
Module 3***, was tested in-situ in the linac and did reach its operating gradient goal.
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Denis Kostin, MHF-SL, DESY TESLA Technology Collaboration (TTC) Meeting, February 28 - March , Milano, Italy