1. PS-Booster Measurements for the LHC -BLM October 2002
8 April, 2003
PS-Booster Measurements for the LHC -BLM October 2002
Edda Gschwendtner, CERN

2. Edda Gschwendtner, CERN
8 April, 2003
Set-up
Ionisation chamber in front of PS beam dump
In/out with a movable table
In addition ACEM detector to check pulse-lengths
Different beam sizes:
H=3.5 mm, V=3.5/1.7 mm
Booster intensity:
5·108 to 8·109
Edda Gschwendtner, CERN

3. Edda Gschwendtner, CERN
8 April, 2003
Ionisation chamber I
N2 filled ionisation chamber
R=4.75 cm
30 gaps
gap-width d = 0.55 cm
-1500 V
Attenuator x 50
Booster:
Ekin = 1.4 GeV p=2.18 GeV
Edda Gschwendtner, CERN

4. Electron & ion induced signal
8 April, 2003
Electron & ion induced signal
Booster intensity: ~ protons
Model:
el =270ns
Model:
ion = 69s
(for vel=20.2 ·105 cm/s
at E=3000V/cm)
(for vion=E=8010 cm/s,
=2.67cm2/Vs)
Edda Gschwendtner, CERN

5. Edda Gschwendtner, CERN
8 April, 2003
Edda Gschwendtner, CERN

6. Edda Gschwendtner, CERN
8 April, 2003
Ionisation chamber II
Number of el-ion pairs created along the detector per 1 proton is:
N=cluster/cm * el-ion/cluster * gap-width * nr_of_gaps
cluster/cm = 23.0
el-ion/cluster =1.89
gap-width = 0.55cm
nr_of_gaps = 30
N=717.1
Measured proton MP
MP = 50att *  V(t) dt / (N * e * 50 )
Edda Gschwendtner, CERN

7. Meas. protons vs Booster protons (tint=300s)
8 April, 2003
Meas. protons vs Booster protons (tint=300s)
Edda Gschwendtner, CERN

8. Meas. protons vs Booster proton (tint=89s)
8 April, 2003
Meas. protons vs Booster proton (tint=89s)
Edda Gschwendtner, CERN

9. Rel. diff. vs Booster proton (tint=300s)
8 April, 2003
Rel. diff. vs Booster proton (tint=300s)
Edda Gschwendtner, CERN

10. ratio tint=300s/ tint=89s vs Booster proton
8 April, 2003
ratio tint=300s/ tint=89s vs Booster proton
Edda Gschwendtner, CERN

11. ratio ion300(89)s el-ion. vs Booster proton
8 April, 2003
ratio ion300(89)s el-ion. vs Booster proton
Edda Gschwendtner, CERN