Status JRA-SRF

Status JRA-SRF

• List of submitted deliverable reports

• Report on continuing activities– WP 2, WP 4

• Status of remaining deliverables

• Highlights

• Approaching the end of JRA-SRF– Annual meeting 2008– Final reports

N° JRA1 Deliverable Name Type Task Lab Planned

26 EB Welding of prototypes of components Prototype 2.3.3.6 DESY 48 subm. to Olivier

2006/7 1-cell spinning parameters defined Report 3.1.4.3 INFN-Leg 36 Care-Report-2008-023-SRF

11 EP on single cells: parameters fixed Report 5.1.5.2 CEA 48 Care-Report-2008-022-SRF

17 Final report on SQUID scanning Report 6.1.5.4 DESY 48 subm. to Olivier

19 DC field emission: evaluation of scanning results Report 6.3.1.9 DESY 48 subm. to Olivier (part of Thesis Arti)

20 DC field emission: evaluate strong emitter investigations Report 6.3.2.6 DESY 48 subm. to Olivier (part of Thesis Arti)

21 Prototype couplers: final report on conditioning Report 7.3.3 CNRS 47 NIM finished +appendix

22 Evaluation of INFN tuner operation Report 8.1.10 INFN-Mi 48 Care-Report-2008-018-SRF

24 Evaluation of BPM operation Report 11.1.12 CEA 48 Care-Report-2007-038-SRF

Progress in %

Status WP2.2 Improved component design

• First cavity prototype with bellows in the middle of the He tank finished and successful tested (tuner WP 8.1)

• Design of an improved end group finished• Construction contract placed to ZANON

for two new end groups (end of July) • Mechanical test of new end group starts

end of October

5 mm NbTi end dish. Stiffness is about 28 kN/mm for each end dish.

7 mm NbTi end dish. Stiffness is about 38 kN/mm

Curved NbTi end dish. Stiffness is about 69 kN/mm

Stresses (MPa) are calculated for 2 bar pressure difference.

WP 4 Vacuum arc coating

• Detailed studies on samples to improve the adhesion– Treatment with 15% citric acid solution – Profilometer measurements– High pressure water tests– Successful recipe for samples

• But no success with cavity coating– Still peeling off after high pressure water cleaning– Analysis of x-ray diffraction measurements (DORIS)

indicate the presence of two distinguished niobium phases.

– Still mechanical problems with cavity shape

Linear Arc coating

WP 4.2.3 Report on Deposition HTC Material by UHV Cathodic Arc

• Several films have been deposited using a niobium cathode in a nitrogen atmosphere.

• The nitrogen pressure, arc current and voltage bias were varied in order to obtain nitride films with good superconducting properties.

• Despite the effort the maximum Tc obtained was ~15K with a large transition width.

• The films were not uniform and presented on the surface aggregates of irregular shape formed in flight.

• Conclusion:– Due to the extreme criticality of parameters it was

concluded that it would be very difficult to obtain the desired nitride cubic phase everywhere on a cavity cell complex geometry surface.

Report on Deposition HTc Material by UHV Cathodic Arc

Figure 3 -Transition to the superconducting state of one of the first UHV arc deposited NbN samples. Tc about 15K, ∆Tc ~5K,

Fig.6 – Peeling on the anode in the cathodic region

N° JRA1 Deliverable Name Type Task LabPlanne

d HIGH RISC5 Fabrication of new cavity with improved components Prototype 2.2.5.2 INFN 47 fabrication in progress at ZANON

6 Fabrication Multi-cell cavities by spinning Prototype 3.1.7.2 INFN-Leg 48 firstprototype finished

7 Fabrication of hydroformed 9-cell cavities Prototype 3.2.6.3 DESY 47 draft finished

8 First multicell coating with linear-arc cathode Prototype 4.1.2.2 IPJ 48 de-scoped, final test in progress

9 First multicell coating with planar-arc cathode Prototype 4.2.2.4INFN-Ro2

41 de-scoped, final test in progress

10 Report on quality of HTc superconducting properties Report 4.2.3.2INFN-Ro2

48 draft finished

12 Evaluate oxipolishing experiments Report 5.2.3.9 DESY 40 report in preparation

13 Final report on industrial electropolishing Report 5.2.4.8 DESY 48 idustrial facilities finished, report in progress

14 Automated EP: Conclude on best electrolyte Report 5.3.5.5INFN-Leg

44 PhD (eng vers)+handbook (finished)

15VT CO2 of 9-cell cavities: evaluation of

experimental resultsReport 5.4.4.2 DESY 48 Report early November

16Dry ice cleaning of horizontal 9-cell cavities: evaluation of experimental results

Report 5.4.6.2 DESY 48 Report early November

18Conclude on comparison of SQUID scanner vs. flux gate detector

Report 6.2.6.2INFN-Leg

48 R&D finished, report in progress

23 Cryostat integration tests: final evaluation Report 10.6.3 CEA 46 ?

25 Evaluation of beam emittance monitor operation Report 11.2.13 INFN-Ro 48 EPAC paper published; new FLASH run?

1 2 3 4 5 6 7 8 9 1

0 0 0 0 0 0 0 0 0 0

0

Progress in %

Status of remaining deliverables

INFN Legnaro: finished 9-cell cavity by spinning

Status seamless cavity by hydroforming• Finished since some time

– Waiting in cue with many TTF cavities for cold test, now ready for cold test

Summary status JRA-SRF

• There is no real show stopper • Basically all work is finished

– Prototypes are fabricated, but not all are measured; is beyond the scope of deliverable

• High risk tasks have been clearly identified in the Annex1– Deliverable is de-scoped, some activities

continue – Summary report in preparation

Aktenzeichen PCT/EP 2008/006577 beim Europäischen Patentamt in München

HIGHLIGHT 1Seamless 9-cell cavity by hydroforming

PhD on best EP ParametersElectropolishing without HF

HIGHLIGHT 2

JRA-SRF Annual Meeting 08

• Not during Annual CARE Meeting at CERN, program is too crowded

• Scheduled for November 08 as Video conference

• We need guidelines for the final report ASAP– Draft should be finished until our annual

meeting