ANALYSIS REPORT CM18

1
ANALYSIS REPORT CM18

• Bi-weekly phone meetings
• 4 5 regular participants
• Y. Torun
• M. Apollonio
• C. Rogers
• R. Sandstrom
• Self
• A few irregulars
• Everyone has other responsibilities
• Regulars reporting CM17 CM 18 activities today

2
Task list from CM17 and before
Since CM17
Run plan -- understand timescales for changes of
absorber etc. -- Time of flight -- RF phase how
to time muons wrt RF ?? -- Algorithm for RF
voltage calibration -- Effects of collimation,
scraping in beamline -- Downstream geometry --
sizes of Shields, TOF2, EMCal -- Done
!!! RF-induced background in TOF (and with
different optics) -- Global PID performance
(up/downstream) different optics/momentum --
Done (Downstream) Beam envelope interference with
cryostat -- Done (RS) Effect of variations in
window shape, absorber density,
etc. -- Scraping/beam envelope/acceptance through
channel and dets -- Done Weighting/virtual
beam -- Performance indicators --Transmission,
emittance, amplitude -- Ongoing Momentum x
Emittance matrix -- Ongoing ------------------
--------------------------------------------------
----------------------------------------------- Ta
ke ownership of dE/dX and scattering models
(physics) -- No takers Understand longitudinal
phase space better emittance growth -- Ongoing
(CR) Understand how to use field maps --- ???
(why?) -- ??? Procedure for RF phasing in
G4MICE -- Done (?) Prioritize simulations for
data challenge -- Done (for the
moment) ------------------------------------------
--------------------------------------------------
------------------------ Diffuser radius
optimisation -- In prog. (M.A.) Matching
ISIS beam into MICE -- do we understand
requirements? -- Database requirements (raised by
P. Kyberd) -- All Effect on optics of lumps of
iron (e.g. cryocooler shields) -- (J.C.) ISIS
(K.T. G4BL) beams through MICE -- (M.A.
T.R ...?) --------------------------------------
--------------------------------------------------
---------------------------- Some tasks overlap
with beamline group ? keep interacting --
Happening
Student project (to be checked)
YT report this mtg
Ongoing
Ongoing w b line gp
Ongoing
Done
Ongoing
Done pro tem
Ongoing
Ongoing now raise priority
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PRIORITIES CM18 19, 20.

• For Steps V and VI
• Understand how to select correct subset
  (x,y,t,px,py,pz) of muons from ISIS beam, i.e.
• Transverse emittance
• Momentum bite
• Timing wrt RF to O(50 100) ps (sine qua non)
• Amplitude momentum correlation
• Know roughly what we want ( FS2 entrance to
  cooling section)
• Not yet clear at least to me what comes down
  beamline
• This will be very difficult
• ? Understand,model use ISIS beam for
  simulations, i.e.
• Start using G4BL / Turtle output ? G4MICE / ICOOL
  
• ? Steps I and II should have equal / higher
  priority

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PRIORITIES CM18 19, 20.

• Steps I and II
• rather new territory (Step VI much much sexier)
• How to measure phase space of beam(s)
  d5N/(dx,dy, dpx,dpy,dpz)
• using tracker TOF0 1 ?
• Tracker pz resolution for individual muons in
  small emittance beam?
• spz gt 6 MeV/c for pt lt 10 MeV/c
• Use TOFs also?
• How well do we need to measure pz to understand
  beam?
• 5 MeV/c ? 10 MeV/c ?
• What should the currents in the matching coils be
  for Step I ?
• Never considered hitherto
• And so on. suggestions welcome
• Understanding required
• Continue / increase working with beamline group

5
1640 Yagmur T. RF background in TOFs
Tracker (report MTA tests) 1705 Rikard S.
PID emittance biases ( report on
Thesis?) 1730 Chris R. Matching into
MICE , Beam required from ISIS etc 1800
Marco A. Diffuser thicknesses, amplitude
measurement 1230 TOMORROW P. Drumm pp R.
Browning MICE User Support
Analysis speakers please keep to time