1. CNRS contribution to ESS – 01/02/173
Spoke cavities
3 prototypes tested w/ excellent results
Preparation & Heat treatment validated on the two ZANON prototypes
Mass production have started
Niobium ordered (-> TOKYO DENKAI)
Kick-off meeting Feb 1st 2017
First Nb sheets available in April 2017
Cavities ordered (-> ZANON)
Kick-off meeting Jan 26th
29 cavities ( spare / tuning procedure validation)
4 first cavities (pre-serie) should be ready end 2017
JL Biarrotte, CNRS/IN2P3

2. CNRS contribution to ESS – 01/02/173
Spoke couplers
4 prototypes fabricated
1 coupler validated (from PMB)
power
Assembled on Romea cavity & sent to Upsala (Jan2017)
Validation test of cavity+coupler in preparation at Upsala
3 other couplers (2 from SCT, 1 from PMB) out of order
2 broken windows (SCT), 1 brasing melting (PMB)
2 new prototypes under fabrication (PMB)
Available end of march 2017
Tb conditionned & installed in prototype cryomodule
Mass production should be launched within 3 months
Once Upsala validation test successful
Target = 1st couplers available March 2018 for first serie cryomodule assembly.
JL Biarrotte, CNRS/IN2P3

3. CNRS contribution to ESS – 01/02/173
Spoke cryomodules & valve boxes
Prototype valve box (CryoDiffusion) received summer 2016
Prototype cryomodule assembled Oct2016
Cryogenic tests on-going since Nov2016
Several cold leaks – reparation on-going
2K validation test still tb performed
Review on spoke cryodistribution postponed to April2016
Goal = test of prototype cryomodule at nominal temperature and power end summer2017 at Upsala
Serie: some easy elements about to be ordered
Target = final cryomodule at Lund in June2019 (instead of January 2019 initially)
JL Biarrotte, CNRS/IN2P3

4. CNRS contribution to ESS – 01/02/173
Miscellaneous
Final meeting of the FR/SW collaboration – December2016 -> final report
Regular meetings ESS / IPN Orsay organized every 2 weeks
VAT issues a priori solved (transparent mandate ok ; internal procedure tb tested at first invoice).
IK agreement CNRS/ESS signed
Technical annexes:
Spoke cryomodules: approved by ESS Council
Cryodistribution: endorsed by IKRC#11 (Dec2016)
Cryo C&C: detailed roadmap & costing under final discussion with ESS
Contribution to elliptical cryomodules: agreement found with CEA – 0€ TA tb drafted & proposed to IKRC
JL Biarrotte, CNRS/IN2P3