Transcript Summary of Envisaged Goals

Beam line commissionning
The following are excepts of what was written in the MOM instructions in August 2008
Aim is to discuss it and update it as necessary.
Overall goals
STEPI: setup optics for pion rate, then muon rate for each of the beam setups needed for the emittance-momentum matrix. Establish optimal pion
momentum setting. Understand muon purity.
Optimize beam rate to beam loss.
STEP II: commission tracker in beam. Practice diffuser. Precise
measurement of emittance in fist one, then all points of the momentum
emittance matrix.
In the process
-- establish alignment and possible need for correctors etc.
-- commission MICE DAQ, C&M, TOF2 & Lumi monitor
The overall plan was as follows: (comments as of
Jun09)
0. When available commission Decay solenoid (DKS) (this is always useful
but necessary for point 4 below onwards, but note that the upstream
optics with or without DKS are different).
1. Optimize the upstream beam line (Q1–Q3) to obtain the maximum GVA1
and GVA2 rate for 350 MeV/c pions. Check alignment. This requires
recording of the ISIS Beam Loss Monitors and MICE Luminosity Monitor.
Not complete yet.
2. Develop an electron beam at about 100 MeV/c for calibration of TOF, CKOV,
KL. Complete particle production study as time permits.
Some of this has been done. With DKS an electron beam will be much better!
3. Commission the downstream beam line with 350 MeV/c pions; check
alignment. Partly done. Develop 200 MeV/c pion beam. All above with
D1=D2
4. When TOF calibrations are done, commission the 200 MeV/c muon beam.
This is nearly done for TOF0 and TOF1, indept of points above.
5. Develop the 200 MeV/c muon beam with 6 mm emittance. Optics
Modified overall plan
0. commission Decay solenoid (DKS) – operate at 500 mV beam loss. Begin
with beamline at D1=D2.
1. Optimize the upstream beam line (Q1–Q3+DKS) to obtain the maximum
GVA1 and TOF0 rate for 350 MeV/c pions. Check alignment. This requires
recording of the ISIS Beam Loss Monitors and MICE Luminosity monitors
2. re-develop the electron beam at about 100 MeV/c for calibration of TOF,
CKOV, KL.
3. re-commission the downstream beam line with 350 MeV/c pions; check
alignment. Re-establish 200 MeV/c pion beam. Check alignment.
4. When TOF calibrations are done, commission the (350 MeV/c pion/200
MeV/c muon) beam. Optimize on DKS excitation. Scan P(muon).
5. Develop the 200 MeV/c muon beam with “6 mm emittance” beam setup.
Evaluate beam parameters and emittance of muon beam at TOF1 with
TOF0 and TOF1. (NB this will not be 6pi)
6. Complete generation of beams for the momentum-emittance matrix
For Step II:
- Recommission TOF1 in its new position inside the field shield.
-Commission tracker possibly with no magnetic field to start
-Practice diffuser (where to start: no diffuser or nominal?)
-Do a careful measurement at nominal emittance
-Analyse results to see if anything went wrong
- complete other measurements
-Analyse
-publish