PS-Booster Measurements for the LHC -BLM October 2002

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Presentation transcript:

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

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

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

Electron & ion induced signal 8 April, 2003 Electron & ion induced signal Booster intensity: ~ 8 109 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

Edda Gschwendtner, CERN 8 April, 2003 Edda Gschwendtner, CERN

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

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

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

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

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

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