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« STEP IV operations : Physics »

« STEP IV operations : Physics ». (one of the) Request from MPB. Establish a set of criteria for the demonstration of the successful conclusion of Step IV for the autumn. (NB these are acceptance criteria of the constructed apparatus) Blondel + Analysis group.

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« STEP IV operations : Physics »

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  1. « STEP IV operations : Physics »

  2. (one of the) Requestfrom MPB • Establish a set of criteria for the demonstration of the successful conclusion of Step IV for the autumn. (NB these are acceptance criteria of the constructed apparatus) • Blondel+ Analysis group The followingis a fist go atansweringthis question. If possible weshouldbe able to show simulation of some of the results MICE note 432

  3. Step IV 1. The MICE step IV program will provide a number of important physics and methodological results: -- Liquid hydrogen absorber realisation and safe routine operation -- engineering test of beamline made of several magnetically connected components -- understanding of propagation of (imperfect) beam through the magnetic bottle -- complete particle detector system; calibrations of emittance measurement to  10-3 -- measurement of 6D emittance change (observation of normalized emittance cooling) -- validation of simulation codes -- limited possibility to test the longitudinal cooling with the wedge absorbers -- correlated precision measurements of multiple scattering and energy loss straggling. These measurements will constitute a textbook contribution to experimental particle physics, and will be essential for reliable simulation of the performance of neutrino factory and muon collider.

  4. STEP IV EXPERIMENTS (2015-2016) No absorber Alignment Optics studies Liq H2 absorber (full/empty) Multiple scattering Energy loss  Cooling Solid absorber(s) LiH Plastic C, Al, Cu LiH Wedge absorber Emittance exchange

  5. A running scheduleunknown +-225 A FLIP ++114 A SOLENOID We plan to runboth configurations will the AFC magnetneedre-training, and how long shouldweallow for this?

  6. scientific plan canbenominallyexecuted in 4 or 5 ISIS user runs (plus contingency) no retraining of more than one weekneeded to go fromsolenoid to flip mode recastschedule to reducenumber of solenoid to flip mode transitions at the expense of more absorber exchanges. scientific plan canbecompleted but willtaketwo or three more ISIS running periods yes yes Magnet system (SS1, FC, SS2) canbetrainedtogether to nominal*) currents in bothsolenoid and flip mode allowing set of threemomenta times three beta functions to beexplored recastschedule to runsolenoid modes onlyfollowed by a few flip mode runs incompletescientificplan canbecompleted. can a set of threemomenta and beta functionsbeachieved in solenoid mode? no yes no **) need to repairmagnet(s) to achievefullysatisfactory running plan *) nominal currents correspond to 200 MeV/c, 42 cm, flip mode optics **) more precise assessment of the situation is needed before following red routes (which currents are achieved and what optics can be reached, etc..)

  7. in the RSLR document:

  8. MICE Note 434

  9. Conclusions and outlook -- Criteria for success and a skeletton of run plan has been written for the Step IV running. -- the wedgeexperimentneeds a little more thinkingbecauseit adresses a new set of questions. -- as all precisionexperimentsisisparamountthat the apparatusis stable during the running. -- the plan isat the moment somewhatidealistic. it must bebacked up with -- a set of optics -- simulations -- the performance of the system of magnetsneeds to beevaluated before one draws the final plan

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