SC Activities at IAP Frankfurt M. Busch March 1st, 2011 Institute for Applied Physics, Frankfurt TTC Meeting

Outline Measurements of the CH-Prototype Status of the 325 MHz CH-Cavity Development of a sc cw linac demonstrator Myrrha update Upcoming Investments Outlook

Cryogenic RF Laboratory in Frankfurt Infra-structure for vertical tests at IAP Control & Diagnosis lead shielding super insulation radiation shield He recovery 200 bar compressor 2kW heating getter-ion pump Linde L140 liquifier, 90 l lHe/hr @ 4K He transfer line sc filling level sensor piezo excitation temperature measurement magnetic shielding heating

The CH-Prototype Number of Gaps 19 Length (mm) 1048 Frequency (MHz) 360 b 0.1 Ep/Ea (bl-definition) 5.2 Bp/Ea [mT/(MV/m)] 5.7 G=RsQ0 (W) 56 Ra/Q (W) (T incl.) 3180 (Ra/Q)G (W2) 178000 Q0 (BCS, 4.2K, 360 MHz) 1.5x109 Q0 (total Rs=150 nW) 3.7x108 W [mJ/(MV/m)2] 92

Test in the old horizontal cryo module (1. prototype)  Test of the piezo tuner system

Pick-up Forwarded Piezo signal

feasible design, showed quite promising results Lessons learned from the CH-prototype: feasible design, showed quite promising results since next gen CH-cavities will be operated with beam, some aspects will be very crucial: thermal shrinkage (well appraisable, but tuning necessary) pressure sensitivity (intermediate measurements before final assembly are imperative) field emission (ominpresent -> thorough cleaning (additional flanges)) Fast tuning (elastic deformation of the cavity works (prototype), but consumes longit. Space -> tuning system inside cavity) drift spaces have to be further minimized (different stem geometry)

Status of the 325 MHz CH-cavity b 0.1545 Frequency (MHz) 325.224 Cells 7 Length bl-def (mm) 505 Diameter (mm) 352 Ea (MV/m) 5 Ep/Ea 5.1 Bp/Ea [mT/(MV/m)] 13 G (W) 64 Ra/Q0 (W) 1248 RaRs (kW2) 80 test Beam test at GSI UNILAC @ 11.4 AMeV

under construction at RI

sc cw Heavy Ion Linac for Super Heavy Elements at GSI f = 217 MHz A / q < 6.5 9 sc CH-cavities Ea = 5 MV/m Utot = 35 MV Sc Solenoids (8 T)

cw Linac Demonstrator Cryo module sc solenoids CH-cavity First sc CH-cavity will be tested with beam at GSI b=0.065, f=217 MHz, 15 cells RF power 5 kW Cavity: call for tender finished Cryo module sc solenoids CH-cavity

Myrrha Beam: 600-1000 MeV Protons Beam current: 4-25 mA (Myrrha, EFIT) Power: 2.4-25 MW (Reactor 20-300 MWth) Duty cycle: 100% Frequency: 352-704 MHz Beam stability: 2% power Maximum 3-10 beam trips per year >1 s Transmission: 99.999% Losses: 1 W/m Lay-out for a 175MHz RFQ (4-Rod) / r.t. CH/ s.c. CH section is currently investigated. Tests for a r.t. & s.c. CH-Cavity are planned. Design of a RFQ prototype module for high power tests has started

Upcoming Investments until Mid of 2012 Amplifier 50 kW (pulsed) 325 MHZ Amplifier 6 kW (cw) 217 MHz Concrete bunker 6x4 m (shielding) New horizontal cryo module 3000 l Helium storage 325 MHz CH-cavity 217 MHz CH-cavity 9T Solenoids (2x) Total investment: 2200 k€

Outlook Most parts of the 325 MHz CH-cavity are fabricated, assembly and first tests within the next months 217 MHz cavity (cw linac demonstrator) is in final design phase, production starts in approx. 3 months Lay-out for all 9 cavities for the cw linac is in progress Myrrha design phase has started

Thank you for your attention