This project has received funding from the European Union’s Horizon 2020 Research and Innovation programme under Grant Agreement No 730871. 1 Testing of Advanced RF Structures TNA WP12 RF Test Stands Roger Ruber (Uppsala University) Walter Wuensch (CERN) 3 rd Annual Meeting, 22 April 2020
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Testing of Advanced RF Structures TNA WP12 RF Test Stands...2020/04/22 · WP12.2 CERN XBox - Overview In proposal - 4 projects with a total of 6000 access units. WP12 Testing of
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This project has received funding from the European Union’s Horizon 2020 Research and Innovation programme under Grant Agreement No 730871.
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Testing of Advanced RF Structures
TNA WP12 RF Test Stands
Roger Ruber (Uppsala University)
Walter Wuensch (CERN)
3rd Annual Meeting, 22 April 2020
WP12 RF Testing Facilities
WP12 Testing of Advanced RF Structures - Roger Ruber - 22-April-2020 - 3rd ARIES annual meeting2
The TNA within WP12 groups TWO facilities devoted to testing of superconducting RF cavities and normal conducting RF cavities.
HNOSSUppsala
University
XBOXCERN
Geneva
TASK 12.1 HNOSS
TASK 12.2 XBOX
WP12.1 UU/FREIA HNOSS Facility
WP12 Testing of Advanced RF Structures - Roger Ruber - 22-April-2020 - 3rd ARIES annual meeting3
The HNOSS facility at the FREIA Laboratory, Uppsala University, Sweden, is available for testing of superconducting RF cavities with integrated helium tank.
HNOSSUppsala
University
TASK 12.1 HNOSS
WP12.1 UU/FREIA HNOSS - Overview
In proposal - 4 projects with a total of 2880 access units.
WP12 Testing of Advanced RF Structures - Roger Ruber - 22-April-2020 - 3rd ARIES annual meeting4
Name Institutes Status Access units Users
ESS High-beta Elliptical Cavity CEA Saclay Completed.
Reported and published.
1330 18
Validation of a prototype
double spoke cavity
cryomodule
IPN Orsay Completed.
Reporting ongoing.
2048 14
RF and piezo actuators
study on spoke cavities
Lodz University
of Technology
Completed.
Reported and published.
36 8
HL-LHC crab cavity cold
testing
CERN Approved end February (480) (7)
TOTAL Achieved Today 3414 (118%) 40
WP12.1 FREIA-HNOSS-2018-01
• Validation of prototype double spoke cavity
cryomodule
• validation valve box in Dec. 2018 & Jan. 2019
• thermo-acoustic (Taconis) oscillations
→ installed RLC circuit
• cryomodule quench → rupture disk replaced
• Results
• RF conditioning → several multipacting bands
• revealed problems in RF stations and LLRF synchronization → fixed!
• stable operation at 2K
• measured accelerating gradient, heat load
→ better than target requirements
• studied Lorenz force detuning,
frequency sensitivity vs. temp., pressure
• Full Report in preparation
WP12 Testing of Advanced RF Structures - Roger Ruber - 22-April-2020 - 3rd ARIES annual meeting5
WP12.1 FREIA-HNOSS-2019-01
• RF and piezo actuators study on spoke cavities
• use cavities from cryomodule project HNOSS-2018-01
• Results
• measurement of piezo & cavity operational parameters,
• verified and modified specifications for spoke cavities
resonance control system
• design verification of control system and algorithms.
• main parameters of designed driver has to be modified
• triggered discussion to harmonize piezo driver
system for ESS spoke and elliptical cavities
• Report
• LLRF 2019 poster
WP12 Testing of Advanced RF Structures - Roger Ruber - 22-April-2020 - 3rd ARIES annual meeting6