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the MICE beam line status

the MICE beam line status. Muon BL: P=208 MeV /c, emi_N = 7 mm rad “ ... the mother of all the beamlines “

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the MICE beam line status

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  1. the MICE beam line status Muon BL: P=208 MeV/c, emi_N= 7 mm rad “ ... the mother of all the beamlines“ Proton BL: derived from (a) by rescaling magnet currents according to local momenta. P=440 MeV/c. Used since Apr. 2008 for initial calibrations/set-up. W and WO decay solenoid (DS). Pion BL: from (a), ditto (b). P=440/300 MeV/c. W and WO DS Electron BL: from (a), ditto (b). P=330 MeV/c. W and WO DS. Used for PID calibrations. NB: values currently used for the 1st triplet (from Logbook) are not the ones suggested in the Optics site. Has anyone a clue why? DOC.: http://www.isis.rl.ac.uk/accelerator/MICE/Task%20Notes%20and%20Specifications/beamline%20-%20optics/index.html

  2. to be done Low proton/pion rate in MICE. ISIS beam simulation (ORBIT, A.Dobbs) and interaction with TGT  signals on BLM7,8 Is pion capture optimal ? In other words, is the first q-pole focusing at the right position? Where is the tgt dipping ?  dimensional survey available MICE Note 216 COMMENT: believe we will have to optimize our tgt dipping and negotiate with ISIS about beam losses. b) and c) can improve our rate (and possibly explain other discrepancies) but they will NOT “recover” a factor 500. PSI solenoid sick! Last coil missing  new optics sought. Which way (i.e. code?) TPT/TTL (more natural and fast to define the optics) G4MICE (I believe it is quite useful for a further hi-definition study) G4beamline (as above) Q.: check geometries vs dimensional survey TOF work (M. Rayner): use TOF stations as emittance measurement devices Customize beamline using local momenta [CAVEAT still wotk in progress] http://www.isis.rl.ac.uk/accelerator/MICE/Task%20Notes%20and%20Specifications/beamline%20-%20optics/some_reference_data.htm General Optics Scaling Spreadsheet for commissioning(MA/KT): Here:- Beamline Scaling Conversion field/current: status in the MLCR ? Web Page: the old Kevin’s one is NOT writable. I need a new space ... and new things to add in ... g) Complete the (e,P) matrix: P=140/240 MeV/c, emi_N= 2,10 mm rad (*) (*) essential for commissioning

  3. Today’s Agenda • Beam Line Today: (Apollonio) 10’ • ISIS to MICE: Orbit Simulations (Dobbs) 10’ • TTL and Real World: geometry and magnets (Apollonio) 10’ • G4MICE and Real World: same  (Rogers/Adey) 10’ • Limping Solenoid: 9/10 coil solution • TTL (Apollonio) 5’ • G4MICE (Adey) 10’ • Emittance Measurements with TOFs (Rayner) 10’ • AoB

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