Q & A EMMA collaboration

Neil Bliss FFAG08 - EMMA STATUS REPORT – 1 st Sep 2008 Q & A (1) What should the bunch charge be ? –8, 16, 32 and 64 pC with 8 only if really needed How do we set D x & D ’ x at the entrance of EMMA ? Do we need to run with 1 pC at all ? –no Which model is the best / easiest to use as –online model (ZGOUBI for now but wraparound will work on others) –standard offline model ZGOUBI / MMCA / GPT / PTC / Scott / Shinji / FFEMMAG How do we crest / zero-cross cavities in the EMMA ring ?

Neil Bliss FFAG08 - EMMA STATUS REPORT – 1 st Sep 2008 What is the best way to zero the dispersion on exit of the EMMA ring ? Do we want to introduce collimators in a region of high dispersion ? where ? any other suggestions to reduce energy spread (if necessary) ? What data do we want displayed by the BPM signals ? Q & A (2)

Neil Bliss FFAG08 - EMMA STATUS REPORT – 1 st Sep 2008 Which systems do we need available from the cavities to read in the control room ? Which BPMs are crucial ? How are RF systems synchronized and which is the best set-up for our first run? Are we happy with the new naming convention ? –See Neil Bliss’ slides & no we are not so everything stays How detailed a TOF scan do we want ? –1 ps Q & A (3)

Neil Bliss FFAG08 - EMMA STATUS REPORT – 1 st Sep 2008 How do we change the frequency in the cavities while setting up the new phase automatically ? Does this still hold if we change the energy ? Q & A (4)

Neil Bliss FFAG08 - EMMA STATUS REPORT – 1 st Sep 2008 Q & A (5) What should be our first run ? When can we claim victory ?