Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 20131Florian Dziuba
Status of the sc cw LINAC Demonstrator
Florian Dziuba
Institut für Angewandte Physik
Frankfurt am Main
Max school 2013
1st and 2nd October 2013
Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 20132Florian Dziuba
Co
nte
nt
Content
1. The cw LINAC Demonstrator2. 217 MHz CH-cavity3. Horizontal cryostat4. Timetable
Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 20133Florian Dziuba
1. T
he
cw L
INA
C D
emo
nst
rato
r
The cw LINAC Demonstratorcollaboration between the Helmholtz Institut Mainz (HIM), GSI and IAP
The cw demonstrator mounted straight ahead to the HLI
The HLI should be used as an injector for the cw LINAC demonstrator
A full performance test of the demonstrator in 2014 is one important milestone on the way to a new sc cw LINAC at GSI
5500 mm
Dome
sc 217 MHz CH-cavity
sc solenoids
Support frame
First layout of the horizontal cryostat for the cw demonstrator (Babcock Noell, GSI, IAP)
Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 20134Florian Dziuba
2. 2
17 M
Hz
CH
-cav
ity
Parameter Unit
Beta 0.059
Frequency MHz 216.816
Gap number 15
Total length mm 687
Cavity diameter mm 409
Cell length mm 40.82
Aperture mm 20 (18)
Ua MV 3.369
Energy gain MeV 2.97
Accelerating gradient MV/ m 5.1
Ep/ Ea 6.4
Bp/ Ea mT/ (MV/m) 5.4
R/ Q Ω 3320
Static tuner 9
Dynamic bellow tuner 3
Main parameters of the 217 MHz CH-structure
The production of the cavity has started in June 2012 at RI GmbH, Bergisch Gladbach, Germany.
Estimated delivery to IAP for first cold tests: Beginning 2014
Helium vessel
Coupler flangePickup flange
Inclinedend stem
Tuner flange
Prepartionflange
Helium out
Static tuner
Dynamic bellowtuner
3D-model of the sc 217 MHz cavity with helium vessel made of titanium
Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 20135Florian Dziuba
2. 2
17 M
Hz
CH
-cav
ity
Simulated voltage distribution
Helium vessel
Coupler flangePickup flange
Inclinedend stem
Tuner flange
Prepartionflange
Helium out
Static tuner
Dynamic bellowtuner
3D-model of the sc 217 MHz cavity with helium vessel made of titanium
The production of the cavity has started in June 2012 at RI GmbH, Bergisch Gladbach, Germany.
Estimated delivery to IAP for first cold tests: Beginning 2014
Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 20136Florian Dziuba
Static and dynamic frequency tuners
Simulated frequency gain of the different tuner types
44 mm
68
mm
9 static tuners 3 dynamic tuners
Static tuner configuration Unit Δf
9 static tuners with tip MHz 4
7 static tuners with tip – 2 without
MHz 3.6
Dynamic tuner deflection Unit Δf
3 dynamic tuners kHz / mm -162 / +193
1 dynamic tuner kHz / mm -57 / +68
24 mm
44 mm
56
mm24 mm
24 mm
2. 2
17 M
Hz
CH
-cav
ity
Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 20137Florian Dziuba
Tuner drive mounted to the helium vessel of a sc CH cavity (left), frequency tuning system including dynamic bellow tuner (middle), and exploded view drawing of all single components of the tuner drive (right).
Dynamic tuner drive for sc CH cavities
A prototype of the new tuner drive was built at the workshop of the IAP. Currently, it is tested under room temperature conditions. Further tests in the clean room and at 4 K are
foreseen during the next months.
2. 2
17 M
Hz
CH
-cav
ity
Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 20138Florian Dziuba
Status of fabrication: Bellow tuner
2. 2
17 M
Hz
CH
-cav
ity
Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 20139Florian Dziuba
Status of fabrication: Stems
2. 2
17 M
Hz
CH
-cav
ity
Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 201310Florian Dziuba
Status of fabrication: Completion of stems and girders, end caps after hydro forming
2. 2
17 M
Hz
CH
-cav
ity
Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 201311Florian Dziuba
3. H
ori
zon
tal
cryo
stat
Sc CH cavity
Sc solenoids
Support frame
Dome
Final design of the horizontal cryomodule for the cw demonstrator. (Cryogenic Limited, London, UK)
Overview horizontal cryostatFabrication of the vessel and of the solenoids has started in August 2013 at Cryogenic
Estimated delivery: Middle of 2014
Design criteria of the new cryostat:
• modular design, universally useable• various flanges for assembling options,
power couplers, tuners, the cryo supply• three part cryostat for easy assembling• all parts with lifting hooks• frame adjustable from outside• dome for electrical supplies with a reservoir
for cryogenic liquids• position control with fiducials• transversal tolerance ±0.2 mm• LHe reservoir 100 l / h• estimated losses 2 l / h
Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 201312Florian Dziuba
4. O
utl
oo
k
THE HORIZONTAL CRYOSTAT
Inner length mm 2200
Inner diameter mm 1120
Material vessel Aluminum
Insulating vacuum mbar < 1·10-5
Max. system pressure bar < 0.5
Operating temperature K 4.4
Temperature thermal shield K 77
Max. static losses (stand by) W < 10
Main parameters of the cryostat
Overview horizontal cryostatEstimated delivery: Middle of 2014
Sc CH cavity
Sc solenoids
Support frame
Dome
Final design of the horizontal cryomodule for the cw demonstrator. (Cryogenic Limited, London, UK)
Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 201313Florian Dziuba
Overview horizontal cryostatEstimated delivery: Middle of 2014
µ-metal shield
Thermal shield
(aluminum)
3. H
ori
zon
tal
cryo
stat
Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 201314Florian Dziuba
Superconducting 217 MHz CH cavity and two superconducting 9.3 T solenoids mounted in the support frame of the cryostat (left) and design of the solenoids (right).
Design of the support frame and the solenoid
3. H
ori
zon
tal
cryo
stat
Compensation coil (NbTi)
Copper band for dry cooling175 mm
Main coil(NbSn)
Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 201315Florian Dziuba
Nuclotron suspension
Dry cooling
Design of the support frame
3. H
ori
zon
tal
cryo
stat
Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 201316Florian Dziuba
Mounting concept of the cold masses
3. H
ori
zon
tal
cryo
stat
Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 201317Florian Dziuba
Mounting concept of the cold masses
3. H
ori
zon
tal
cryo
stat
Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 201318Florian Dziuba
4. T
imet
able
August 2013: Production of the horizontal cryostat and solenoids has started
November/December 2013: First measurements of the 217 MHz cavity at RI(determination of static tuner height, frequency gain
of dynamic bellow tuners, determination of external Qe, bead pull measurements)
Beginning 2014: First cold test of the 217 MHz CH cavity at IAP
Feburary/March: Delivery of the 217 MHz cavity
Middle 2014: Delivery of cryostat with sc solenoids – full perforemance tests
Timetable
Institut für Angewandte Physik
LINAC AG
Max school, October 2nd 201319Florian Dziuba
Thank you very much for your attention!