1. ACCSYS Collaboration Board Triestre, 3rd october 2017
Anne-Isabelle ETIENVRE

2. Elliptical Cryomodules
Medium b Demonstrator (M-ECCTD) tests results
High Beta cavity vertical tests result
Almost ready for production …
2. RFQ Status
3. Beam Instrumentation
1. NPM
2. nBLMs

3. ESS ELLIPTICAL CRYOMODULES
IMAGE
CEA – IRFU
2018
CEA Saclay/Irfu projet ESS | DATE

4. ESS ELLIPTICAL CRYOMODULES M-ECCDT : medium beta demonstrator
IMAGE
CEA – IRFU
2018
CEA Saclay/Irfu projet ESS | DATE

5. M-ECCTD : top view of saclay test stand
ACCSYS Collaboration Board Triestre, October 2018

6. 1st HIGH RF POWER TESTS at 1 MW and 2K
14Hz ; Nominal Field (> 16,7 MV/m) ; RF peak power : 1,1MW ; RF pulse length 3,6ms
With Lorentz forces compensations (Piezo)
Without Lorentz forces compensations (Piezo)
MV/m
MV/m
Zoom
Happy CEA team !
MV/m
ACCSYS Collaboration Board Triestre, October 2018

7. ESS ELLIPTICAL CRYOMODULES H-ECCDT : high-beta demonstrator
IMAGE
CEA – IRFU
2018
CEA Saclay/Irfu projet ESS | DATE

8. H-ECCTD : 1st high betaq bare cavity vertical cryostat measurements
High b Cavity tuning
ACCSYS Collaboration Board Triestre, October 2018

9. ESS ELLIPTICAL CRYOMODULES COMPONENTS PRODUCTION LAUNCHED
IMAGE
CEA – IRFU
2018
CEA Saclay/Irfu projet ESS | DATE

10. CRYOMODULES COUPLERS : on track pre-serie components conditioned
1.2 MW
10 prototype couplers already conditioned with success +
6 pre series CM couplers (medium b) delivered at Saclay
5 fully conditionned
1 partially conditionned
ACCSYS Collaboration Board Triestre, October 2018

11. Cryomodules : Delivery of pre-serie components
ACCSYS Collaboration Board Triestre, October 2018

12. RFQ
CEA Saclay/Irfu projet ESS | DATE

13. RFQ CAVITIES / Section 1 assembly trial
ACCSYS Collaboration Board Triestre, October 2018

14. RFQ – SKID INStalled in june 2018 (Lund)
ACCSYS Collaboration Board Triestre, October 2018

15. RFQ couplers conditioned at nominal performances + margins with ICS contribution
Control System for couplers conditioning
Test cavity with both couplers ready for conditioning
Power
Vacuum
Temperatures
48 hours long conditioning (1 MW – 3.6 ms – 14 Hz)
ACCSYS Collaboration Board Triestre, October 2018

16. NON INVASIVE PROFILE MONITORS
BEAM INSTRUMENTATION
NON INVASIVE PROFILE MONITORS
&
BEAM LOSS MONITORS
CEA Saclay/Irfu projet ESS | DATE

17. Beam instrumentation : profile monitor
Measures on IPHI facility before CDR planned in december
IPHI platform
IPM CCD camera & control system
IPM with strips read-out
ACCSYS Collaboration Board Triestre, October 2018

18. nBLMs : differents tests before CDR planned in december
BEAM INSTRUMENTATION
nBLMs : differents tests before CDR planned in december
Beam tests at different irradiation facilities in 2018
IPHI CEA/Saclay
3 MeV p on Be target and Al endcap
AMANDE, IRSN,Cadarache
Monoenergetic n or γ+n yields
MC40, Birmingham, UK
28 MeV p on Al target
Linearity with beam current
28 MeV proton beam on an aluminum target
Time Response
Fast module: Immediate response, count rate has a direct correlation with beam current intensity.
Slow module : most of events recorded within μs, but higher efficiency. Still ~5% of events will be register within 5μs
Gamma to neutron suppression
γ sensitivity with resect to neutrons , depending on threshold
Higher threshold  stronger suppression but with efficiency loss
Complete suppression possible. Operation point to be chosen according to actual conditions
ACCSYS Collaboration Board Triestre, October 2018

19. ORPHEE nuclear reactor
nBLMs efficiency measurements
Detector Efficiency
ORPHEE nuclear reactor
LLB, CEA Saclay
0.01 eV neutrons, flux 2×106 s-1 cm-2
Analysis ongoing
Stable operation with high current (up to 600 nA), no discharges
Verified that 5 mm Borflex absorbs completely the thermal neutrons
study the detector operation parameters (B4C thickness, drift gap, operating voltages) to optimize signals (duration, amplitude etc.)
Planning
CEA Saclay SPR: 110 GBq AmBe, Co, Cs sources
CEA Saclay: cryo-module testing
CERN Linac4:
Installed a detector in the hall (without interfering!) in Aug 2018.
Profit from on-going run to test response, backgrounds, BEE (November) in most similar(?) conditions available to the ESS linac
Other tests
Fast detector
Slow detector
Dependence with neutron energy
Mylar vs Polypropylene
Dependence with neutron energy
Double efficiency when 1 mm polypropylene is used instead of 100 μm Mylar. However, we choose the Mylar due to the stability of the metallization, sacrificing a factor 2 in count rate.
Dependence with polyethylene
Dependence with EDEP threshold
For the slow detector the area of the moderator is used for the calculation (25×25 cm2) While for the fast the active zone (8×8 cm2) !
Moderator thickness chosen for final detector: 5 cm
ACCSYS Collaboration Board Triestre, October 2018

20. Conclusion
CEA Saclay/Irfu projet ESS | DATE

21. 1. RFQ : machining of cavities seems to be under control
Conclusion
1. RFQ : machining of cavities seems to be under control
2. Elliptical Cryomodules : production phase is launched and assembly will start in january with industrial team.
3. Beam Instrumentation / Diagnostics : several mesures are going on to demonstrate performances before CDR milestones.

22. Thank you for your attention
CEA Saclay/Irfu projet ESS | DATE