Institut für Angewandte Physik LINAC AG Max school, October 2nd Florian Dziuba Status of the sc cw LINAC Demonstrator Florian Dziuba Institut für Angewandte Physik Frankfurt am Main Max school st and 2nd October 2013

Institut für Angewandte Physik LINAC AG Max school, October 2nd Florian Dziuba Content 1.The cw LINAC Demonstrator MHz CH-cavity 3.Horizontal cryostat 4.Timetable

Institut für Angewandte Physik LINAC AG Max school, October 2nd Florian Dziuba 1. The cw LINAC Demonstrator The cw LINAC Demonstrator collaboration 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 Florian Dziuba MHz CH-cavity ParameterUnit Beta0.059 FrequencyMHz Gap number15 Total lengthmm687 Cavity diametermm409 Cell lengthmm40.82 Aperturemm20 (18) UaUa MV3.369 Energy gainMeV2.97 Accelerating gradientMV/ m5.1 E p / E a 6.4 B p / E a mT/ (MV/m)5.4 R/ QΩ3320 Static tuner9 Dynamic bellow tuner3 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 flange Pickup flange Inclined end stem Tuner flange Prepartion flange Helium out Static tuner Dynamic bellow tuner 3D-model of the sc 217 MHz cavity with helium vessel made of titanium

Institut für Angewandte Physik LINAC AG Max school, October 2nd Florian Dziuba MHz CH-cavity Simulated voltage distribution Helium vessel Coupler flange Pickup flange Inclined end stem Tuner flange Prepartion flange Helium out Static tuner Dynamic bellow tuner 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 Florian 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 configurationUnitΔfΔf 9 static tuners with tipMHz4 7 static tuners with tip – 2 without MHz3.6 Dynamic tuner deflectionUnitΔfΔf 3 dynamic tunerskHz / mm-162 / dynamic tunerkHz / mm-57 / mm 44 mm 56 mm 24 mm MHz CH-cavity

Institut für Angewandte Physik LINAC AG Max school, October 2nd Florian 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 MHz CH-cavity

Institut für Angewandte Physik LINAC AG Max school, October 2nd Florian Dziuba Status of fabrication: Bellow tuner MHz CH-cavity

Institut für Angewandte Physik LINAC AG Max school, October 2nd Florian Dziuba Status of fabrication: Stems MHz CH-cavity

Institut für Angewandte Physik LINAC AG Max school, October 2nd Florian Dziuba Status of fabrication: Completion of stems and girders, end caps after hydro forming MHz CH-cavity

Institut für Angewandte Physik LINAC AG Max school, October 2nd Florian Dziuba 3. Horizontal cryostat Sc CH cavity Sc solenoids Support frame Dome Final design of the horizontal cryomodule for the cw demonstrator. (Cryogenic Limited, London, UK) Overview horizontal cryostat Fabrication 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 Florian Dziuba 4. Outlook THE HORIZONTAL CRYOSTAT Inner lengthmm2200 Inner diametermm1120 Material vesselAluminum Insulating vacuummbar< 1·10 -5 Max. system pressurebar< 0.5 Operating temperatureK4.4 Temperature thermal shieldK77 Max. static losses (stand by)W< 10 Main parameters of the cryostat Overview horizontal cryostat Estimated 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 Florian Dziuba Overview horizontal cryostat Estimated delivery: Middle of 2014 µ-metal shield Thermal shield (aluminum) 3. Horizontal cryostat

Institut für Angewandte Physik LINAC AG Max school, October 2nd Florian 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. Horizontal cryostat Compensation coil (NbTi) Copper band for dry cooling 175 mm Main coil (NbSn)

Institut für Angewandte Physik LINAC AG Max school, October 2nd Florian Dziuba Nuclotron suspension Dry cooling Design of the support frame 3. Horizontal cryostat

Institut für Angewandte Physik LINAC AG Max school, October 2nd Florian Dziuba Mounting concept of the cold masses 3. Horizontal cryostat

Institut für Angewandte Physik LINAC AG Max school, October 2nd Florian Dziuba Mounting concept of the cold masses 3. Horizontal cryostat

Institut für Angewandte Physik LINAC AG Max school, October 2nd Florian Dziuba 4. Timetable 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 Q e, 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 Florian Dziuba Thank you very much for your attention!