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!