Pierre Bosland 4 TH OF FEBRUARY 2016 COORDINATION COMMITTEE FR-SW AGREEMENT STATUS OF THE FRENCH ACTIVITIES UNDER THE RESPONSIBILITY OF CEA

2 4 TH OF FEBRUARY 2016 FR – SW agreement + amendments IRFU activities With IPNO for ECCTD Project #1 : Injector reliability test Project #2 : 352 MHz power coupler bunker Projects #3, #5 and #8: Medium Beta ECCTD (M-ECCTD) Project #4 : Contribution to the TDR

3 4 TH OF FEBRUARY 2016 Project #1: Beam tests with IPHI

4 4 TH OF FEBRUARY 2016 Start of the RFQ commissioning First RF tests up to 100kW at 1% duty cycle during summer May 2015: start of the RFQ commissioning. Pressure increase in the RF windows Problem! The 2 characteristics, ridge temperature increase and the detuning of the 2 nd sector observed, are explained by a degradation of the RF seal of the ridge. Ridges temperature increase

5 4 TH OF FEBRUARY 2016 Q3 High level of arcing on the ridge side where there is no RF gasket in this previous design Q2 Q3 Arcs on the ridges Q2 & Q3 RF gasket partly destroyed in Q3

6 4 TH OF FEBRUARY 2016 Technical solution implemented New RF gaskets mounted on the modified ridges Gasket groove remachined on the ridges Previous gasket New gasket Q3 with the new gasket before assembly on the RFQ New groove design on the side of the ridge The modified ridges have been remounted Pumping the RFQ is ongoing and the vacuum level is excellent (5.E-8mbar) RF power tests are starting this week (W 5)

7 4 TH OF FEBRUARY 2016 Klystron Thales TH 2179B FAT:Aug 2015 Delivery date:Nov SAT:March 2016 (TBC) Pulsed RF power source at 352MHz Klystron and modulator delivered Modulator DTI/Sigmaphi FAT:Dec 2015 Delivery date:January 2016 The 352MHz RF source will be used for the RF processing of the power couplers of the RFQ at the beginning 2017.

8 4 TH OF FEBRUARY 2016 Project #2: 352 MHz RF test stand The coupler processing setup is ready in the 352MHz test stand at Saclay See IPN Orsay presentation

9 4 TH OF FEBRUARY 2016 Projects #3, #5, # 8: Medium beta ECCTD Collaboration IPNO - IRFU

1 rst medium beta cavity: Frequency and length are close to expected values: F= 703,93 MHz after tuning L= mm (-1mm from nominal length) Most dangerous HOM identified At delta F >17MHz from the 5 th beam line TE like modes (not dangerous, very weakly coupled to the beam) Forbidden area (+/- 5 MHz) for longitudinal HOMs Field flatness done before and after1rst chemical treatment: 95% achieved (green curve). 1 rst chemical treatment done: ~ 100µm Observations: Strong heterogeneity of the attack speed between equators (~40µm) and irises (~200µm) The acid temperature increased up to 25°C (a better control of T is required). HOM issue : no risk for this cavity Cavity as received: the most dangerous HOM is at ~17MHz from the 5 th beam line (spec > 5MHz) The frequency shifts due to field flatness and 1 rst chemical treatment doesn’t cause any problem Release for the fabrication of the 5 last Mbeta cavities: Start the second cavity fabrication : beginning of week 6 Start the 4 last cavities after vertical test of the 1 rst cavity Test in vertical cryostat on Week 7 M-ECCTD Impact on the M-ECCTD planning: analysis in progress

P Power couplers: Ceramic windows (Toshiba): Factory acceptance of the 2 first ceramic windows. Delivery week W4. External conductors: fabrication completed, last operation is copper deposition. Copper coating in progress in the final tubes. Delivery scheduled begining of February. Copper coating not yet done Rectangular samples Cylindrical sample H-beta prototype cavities: Q degradation after heat treatment New tests in vertical cryostat done after improvement of the magnetic shielding : very small effect on the Q. The hypothesis of a pollution during the heat treatment process is the most probable Qualification of copper coating on samples: OK (RRR=35)

MOCKUPS AND PREVIOUS VALIDATION TESTS Atmospheric pressure compensation system RF trap of the doorknob: validation of the RF gasket grooves and assembly Cavity mockup (Delivered but still in the box!) Coupler mockup Modification of the coupler bell to increase the stiffness Check of the spring stiffness spead

13 4 TH OF FEBRUARY 2016 Production of the main components and the toolings is in progress The ESS BÔTH is being equiped (cryomodule assembling outside the cleanroom) The vacuum chamber, space frame should be installed with assembling toolings before the end of february ……… Alignment of the rails used for the insertion of the cavity string inside the vacuum tank.

Call for tender launched for a new RF source at 704M Hz for the coupler processing:1.5 MW klystron + modulator (100 kV – 20 A). Offers mid of February Existing Klystron CPI 1,0 MW New Klystron 1,5 MW Cryomodule & coupler RF processing test stands Completion of the LHe cryoline Installation The IOxOS ADC card have been validated on a VME64x crate

15 4 TH OF FEBRUARY 2016 GENERAL PLANNING OF M-ECCTD We are waiting for the planning of ZANON for the fabrication of the 5 last cavities. Chosen scenario: gain of time with limited risks. But change of the development plan of the contract (Seem to be accepted by ZANON)

16 4 TH OF FEBRUARY 2016 Project #4: TDR contributions RFQ technical design

17 4 TH OF FEBRUARY 2016 The 2 technical notes are finalized ESS ESS RFQ DESIGN COMPLETED The Project #4 can be closed The second CDR for the RFQ was conducted in Saclay on December 8 th and 9 th. This review focused on the manufacturing of the five cavity sections, the power coupler and slug tuners. The review was passed successfully and the call for tender was launched on Friday 18 December.

18 4 TH OF FEBRUARY 2016 Thank you for your attention