Vertical Test Area RF qualification of C100 cavities for 12 GeV
project Mircea Stirbet Open Collaboration Meeting on
Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9
December 2011 CERN Geneva Switzerland
Slide 2
CHL-2 New cryomodules get new rf zones CEBAF 12 GeV Upgrade New
cryomodules: 10 Voltage per cryomodule: 108 MV avg. Cavities per
cryomodule 8 Heat budget: @ 2.07 K 300 W / CM 29 W / cavity, avg.
Cavity: 1.497 GHz 0.7 m Low loss cell shape Higher order mode
damping: - Transverse (R/Q)Q k < 2.4 x 10 10 /m - Longitudinal
(R/Q)Q < 6.5 x 10 11 /m Key Project Parameters
Slide 3
Principles Open Collaboration Meeting on Superconducting Linacs
for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN
Geneva Switzerland - All cavities (R100 and C100) for 12 GeV
project should be qualified in Vertical Test Area (VTA) before
being string assemble. - VTA tests will be done on cavities with or
without He vessels.
Slide 4
Open Collaboration Meeting on Superconducting Linacs for High
Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN Geneva
Switzerland State-of-the-art production SRF cavity
Slide 5
Open Collaboration Meeting on Superconducting Linacs for High
Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN Geneva
Switzerland Inventory Receipt Visual Inspection Dimensional Receipt
Inspection via CMM RF Receipt Inspection Ultrasonic Clean 1 hour at
120F DI+Liquinox Heat Treatment 10 hours at 600C Ultrasonic Clean 1
hour at 120F DI+Liquinox Electropolish 30 microns at 20C Ultrasonic
Clean 1 hour at 120F DI+Liquinox RF Tune Dimensional Check and
Correction Helium Vessel Welding Measure RF Properties Lap Vacuum
Seal Surfaces Final Dimensional CMM Ultrasonic Clean 1 hour 120F
DI+Liquinox First HPR 2 hours, 2.4 gpm at 1250 psig First Assembly
Class 10 Final HPR 2 hours, 2.4 gpm at 1250 psig Final Assembly
Class 10 Test Stand and Leak Check Bake 24 hours at 120C RF Test 2K
Dewar Qualified? Store in Clean Room for String Assembly 12 GeV
C100 Cavity Process Flow
Slide 6
Open Collaboration Meeting on Superconducting Linacs for High
Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN Geneva
Switzerland Vertical test Area (VTA): Qualification tests - HOM
survey - RF power qualification: a)Cavity performances: Lock
frequency, Emax, FE onset, Radiation, test limits, cavity vacuum.
b)Qo vs Eacc c)Rad vs Eacc d)HOM A and HOM B vs Eacc e)Delta Freq
vs Eacc2 f)Qo vs T Data mining and analysis for eventual corrective
actions for the process flow.
Slide 7
Open Collaboration Meeting on Superconducting Linacs for High
Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN Geneva
Switzerland Vertical test Area (VTA): Landing area and control
room
Slide 8
Open Collaboration Meeting on Superconducting Linacs for High
Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN Geneva
Switzerland Vertical test Area (VTA): Dewars and control room
Vertical test Area (VTA): Dewars area
Slide 9
Vertical test Area (VTA): HOM survey - Specifications -
Measurement methods : manual and enhanced Polfit package based on
Carstens and Hans Walter method to extract loaded Q from measured
scattering parameters. Open Collaboration Meeting on
Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9
December 2011 CERN Geneva Switzerland
Slide 10
Vertical test Area (VTA): HOM survey cont.
Slide 11
Operator interface low loss cavity LL002 at 44 MV/m Open
Collaboration Meeting on Superconducting Linacs for High Power
Proton Beams (SLHiPP-1) 8/9 December 2011 CERN Geneva
Switzerland
Slide 12
Operator interface LabView program Open Collaboration Meeting
on Superconducting Linacs for High Power Proton Beams (SLHiPP-1)
8/9 December 2011 CERN Geneva Switzerland
Slide 13
Data acquisition, traveler, Excel macro Open Collaboration
Meeting on Superconducting Linacs for High Power Proton Beams
(SLHiPP-1) 8/9 December 2011 CERN Geneva Switzerland
Slide 14
Qo and Rad vs Eacc Open Collaboration Meeting on
Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9
December 2011 CERN Geneva Switzerland
Slide 15
HOM A and HOM B power vs Eacc Open Collaboration Meeting on
Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9
December 2011 CERN Geneva Switzerland
Slide 16
Lorentz coefficient Open Collaboration Meeting on
Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9
December 2011 CERN Geneva Switzerland
Slide 17
1/Qo vs temp Open Collaboration Meeting on Superconducting
Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011
CERN Geneva Switzerland
Slide 18
E max of VTA Qualified Cavities for 12 GeV Upgrade
Slide 19
Open Collaboration Meeting on Superconducting Linacs for High
Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN Geneva
Switzerland E max of VTA Qualified Cavities for 12 GeV Upgrade
Slide 20
Open Collaboration Meeting on Superconducting Linacs for High
Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN Geneva
Switzerland Qualified Cavities for 12 GeV Upgrade Cryomodule
C100-3
Slide 21
Data mining Open Collaboration Meeting on Superconducting
Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011
CERN Geneva Switzerland
Slide 22
Data mining Open Collaboration Meeting on Superconducting
Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011
CERN Geneva Switzerland
Slide 23
Data mining Open Collaboration Meeting on Superconducting
Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011
CERN Geneva Switzerland
Slide 24
-Cables (some trivial cables not connected, broken connectors
supposed to operate at low temperature). -Lambda vacuum leaks.
-Occasional high radiation levels > all cavities are now
radiation monitored after VTA tests. -Clean room over crowed
(sometimes). -Glycol spill. -Vibration due to demolition, fumes and
dust from construction area, power outages. Issues during VTA
qualification tests Open Collaboration Meeting on Superconducting
Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011
CERN Geneva Switzerland
Slide 25
12 GeV Upgrade Cavities Production Tracking System
Slide 26
Open Collaboration Meeting on Superconducting Linacs for High
Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN Geneva
Switzerland C100 string assembly All remaining cavity strings
should be clean room assembled by the middle for Feb 2012
Slide 27
Cryomodule assembly Open Collaboration Meeting on
Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9
December 2011 CERN Geneva Switzerland - All 80 cavities will be VTA
qualified by mid Dec 2011 important effort to qualify at least 3
cavities each week! - 3 Cryomodules installed and commissioned in
CEBAF machine (R100 and 2 C100). - C100-3 advanced qualification
tests in CMTF - 7 cavity strings in different phases of assemble -
All reaming cavity strings should be clean room assembled by the
middle of February 2012.
Slide 28
VTA operator team for 12 GeV project Open Collaboration Meeting
on Superconducting Linacs for High Power Proton Beams (SLHiPP-1)
8/9 December 2011 CERN Geneva Switzerland Kirk Davis Christiana
Grenoble Mircea Stirbet Tiffany Bass Pete Kushnick Grigory Emereev
Ari Palczewski Gianluigi Ciovati Rongi Geng John Mammosser Andrew
Burrill Tom Goodman J. C. Westby-Gibson Cryogenie support Pete
Kushnick Tiffany Bass Danny Forehand Pansophy support Valery
Bookwalter Bonnie Madre Melody Jones Crane operators Chris Dreyfus
Steve Castagnola Tom Goodman Danny Forehand Roland Overton
Slide 29
TUPO061 SRF 2011 Chicago, July 25-29, 2011 Open Collaboration
Meeting on Superconducting Linacs for High Power Proton Beams
(SLHiPP-1) 8/9 December 2011 CERN Geneva Switzerland
Slide 30
Conclusions Open Collaboration Meeting on Superconducting
Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011
CERN Geneva Switzerland Almost all cavities for 12 GeV project are
qualified. Thank you !!!