pE3 beam

1
pE3 beam

• Beam Layout
• Beam dynamics
• Measurements
• Tuning instrumentation and plan

References http//www.npl.uiuc.edu/exp/mucapture/
coll/beam/beam.html
2
Layout and tune
3
From P. Debevec
QSB to end of configurations 23
22
slit 3
36.5
2.5
50
slit 4
4.5
50
QSM
50
QSM
configuration 2
50
QSM
7
19.5
16.5
125
End
configuration 3
4
Dispersive Focus ?
Standard MuLan
dispersive
5
Dispersive focus?
dispersive
Standard MuLan
6
MuLan measurements
standard
dispersive
7
Peter and Steve measurements
Ref http//www.npl.uiuc.edu/exp/mucapture/notes/p
iE3.pdf
On the last days of the summer 2003 MuLan run,
Steve and Peter investigated the performance of
the piE3/MuLan beam for 34 MeV/c mu-. The
separator was probably around 160 KV. Our
detectors were located immediately after the beam
window of configuration 3.
S1 15x15x3 mm3
S2 15x15x3 mm3
3x3 cm2 FWHM, MuLan
8
Mu- measurements contd
Separator scan. ("muminus500b")
The S2 rate includes beam e and Michel e. The mS1
rate counts muons and Michel electrons. The small
coinc rate mS1S2 limits the Michel contribution
to lt5. As a better estimate one could scale the
S2 rate to the mS1 electron peak and subtract.
The eS1 rate indicated some uncounted
contribution of muon and electrons to mS1. The
comparison S2 with mS1 suggests a 10 e
contamination at separator B700 DAC.    

9
Mu- measurements contd
degader
eSC1
eSC2
Cu
Conclusions        30kHz mu- certainly possible.
Focus ok, electrons ok. Momentum bin has to be
reduced, needs simulation and experiment.
Consistency with mu measurments?        MORE
mode Problems rate probable 200k achievable,
with acceptable e contamination. If that can be
achieved with 2 momentum variance has to be
studied. Finally, effect of kicker RF on
sensitive chambers needs to be tested
experimentally.
10
Instrumentation beam studies
SWIC
Beam pipe with welded window flange
11
August tuning plan
Discuss in workgroup Francoise coordinator ?