E. KAKO (KEK) 2010' Nov. 02 S1-G Webex meeting Global Design Effort 1.

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Presentation transcript:

E. KAKO (KEK) 2010' Nov. 02 S1-G Webex meeting Global Design Effort 1

E. KAKO (KEK) 2010' Nov. 02 S1-G Webex meeting Global Design Effort 2 High field performance of 8 cavities Lorenz detuning at flat-top Schedule in Nov. and Dec., LFD compensation by KEK hardware 2. Dynamic heat load measurements in each cavity, 4 cavities, 8 cavities 3. LLRF control exp. in 8 cavities Schedule in Jan. and Feb., DRFS (distributed RF system) exp. Outline

E. KAKO (KEK) 2010' Nov. 02 S1-G Webex meeting Global Design Effort 3 MHI-09 MHI-07 MHI-06 MHI-05AES004ACC011Z108Z109 FNALDESY KEK Vertical Test ave. 30 MV/m 2010’ Oct. 21 Flat-top = 1.0 ms, 5 Hz Comparison of VT and CT Cryomodule Test ave. 28 MV/m

E. KAKO (KEK) 2010' Nov. 02 S1-G Webex meeting Global Design Effort 4 Comparison of VT and CT Severe degradation of 9~12 MV/m in ACC011 (FNAL) Z108 (DESY) ave. Eacc,max = 25.3 MV/m (Cryomodule-C) ave. Eacc,max = 30.4 MV/m (Cryomodule-A)

E. KAKO (KEK) 2010' Nov. 02 S1-G Webex meeting Global Design Effort 5 Lorentz detuning experiments A1/MHI MV/m A3/MHI MV/m A2/MHI MV/m A4/MHI MV/m FB/on, Piezo/offFB/off, Piezo/offFB/on, Piezo/off  f ~100Hz  f ~300Hz  f ~150Hz

E. KAKO (KEK) 2010' Nov. 02 S1-G Webex meeting Global Design Effort 6 Lorentz detuning experiments C1/AES MV/m C3/Z MV/m C2/ACC MV/m C4/Z MV/m FB/on, Piezo/offFB/off, Piezo/offFB/on, Piezo/off  f ~450Hz  f ~200Hz  f ~300Hz

E. KAKO (KEK) 2010' Nov. 02 S1-G Webex meeting Global Design Effort 7 Lorentz force detuning at flat-top (Preliminary)  f in KEK cavities is approx. 1/3 of that in DESY/FNAL cavities due to an improved stiffness in the cavity-jacket structure.

E. KAKO (KEK) 2010' Nov. 02 S1-G Webex meeting Global Design Effort 8 November, 2010 Holiday Mon Tue Wed Thu Fri Sat Sun A-1A-2A-3A-4 Dynamic Loss Meas. Lorentz Detuning Compensation A-1/C-1A-2/C-2A-3/C-3A-4/C-4 C-1 C-2C-3C-4 Dynamic Loss Meas. (Holiday) Repair of Cryogenic System Delay from original schedule is 3 ~ 4 weeks. original

E. KAKO (KEK) 2010' Nov. 02 S1-G Webex meeting Global Design Effort 9 December, 2010 Holiday Mon Tue Wed Thu Fri Sat Sun Warm up DRFS Preparation Heat Load at 2K Calibration by Heater LLRF 8 cav. Dynamic Loss 8 Cavity Control 4 Cavity Control A 4 cav.C 4 cav. Dynamic Loss (under discussion)

E. KAKO (KEK) 2010' Nov. 02 S1-G Webex meeting Global Design Effort 10 January, 2011 Sun Mon Tue Wed Thu Fri Sat Cool-down Start Heat Load Meas. at 4K to 2K Cavity Performance Check fo, QL, Eacc,max, piezo Holiday (under discussion)

E. KAKO (KEK) 2010' Nov. 02 S1-G Webex meeting Global Design Effort 11 February, 2011 Mon Tue Wed Thu Fri Sat Sun Milano DRFS (1) DRFS (2) Cavity Performance Tests Warm up Holiday DRFS (3) (under discussion)

E. KAKO (KEK) 2010' Nov. 02 S1-G Webex meeting Global Design Effort 12