PAC2001, Two-Stream Instabilities and Collective Processes, prepared by J.M. JIMENEZCERN Division LHC - Vacuum Group

22/06/2001 SPS Machine: a vacuum test bench for theelectron cloud studies with LHC type beams

SPS Machine as a Vacuum Test Bench for the Electron Cloud

Studies with LHC Type Beams

G. Arduini1, V. Baglin3, P. Collier1, G. Ferioli2,

B. Henrist3, N. Hilleret3, B. Jenninger3, J.M. Jimenez3,

J.M. Laurent3, K. Weiss3, F. Zimmermann4

1SL/OP, 2SL/BI, 3LHC/VAC, 4SL/AP

CERN, Geneva, Switzerland

SSWG prepared by J.M. JIMENEZCERN Division LHC - Vacuum Group

17/07/2001

G. A

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. Bag

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P. C

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er, G

. Fer

ioli

, B. H

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st, N

. Hil

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t, B

. Jen

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.M. L

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.M. J

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SPS Machine as a vacuum test bench for theelectron cloud studies with LHC type beams

FUTURE EXPERIMENTS

• Pick-ups - Characteristics and Energy Distribution

– e- cloud build-up (4 pick-ups) ok

– Energy distribution of the electrons (2 pick-ups) installed

– Triggering of the experiments on the LHC batch ok

• Behaviour of the electrons in a dipole magnetic field - Spatial Distribution

– “strip” detector (1 detector) “ok”

– “triangle” detectors (2 detectors, 1 with a filtering grid) installed

• Scrubbing effect by measuring in-situ the modification of the secondary electron yield ok

• Ions detector to exclude ion stimulated desorptioninstalled

• Warm-pack to measure the power dissipated by the e-cloud calibrated

SSWG prepared by J.M. JIMENEZCERN Division LHC - Vacuum Group

17/07/2001

G. A

rdui

ni, V

. Bag

lin,

P. C

olli

er, G

. Fer

ioli

, B. H

enri

st, N

. Hil

lere

t, B

. Jen

ning

er, J

.M. L

aure

nt, J

.M. J

imen

ez, K

. Wei

ss, F

. Zim

mer

man

n

SPS Machine as a vacuum test bench for theelectron cloud studies with LHC type beams

Triangle detector

SSWG prepared by J.M. JIMENEZCERN Division LHC - Vacuum Group

17/07/2001

G. A

rdui

ni, V

. Bag

lin,

P. C

olli

er, G

. Fer

ioli

, B. H

enri

st, N

. Hil

lere

t, B

. Jen

ning

er, J

.M. L

aure

nt, J

.M. J

imen

ez, K

. Wei

ss, F

. Zim

mer

man

n

SPS Machine as a vacuum test bench for theelectron cloud studies with LHC type beams

Strip detector

SSWG prepared by J.M. JIMENEZCERN Division LHC - Vacuum Group

17/07/2001

G. A

rdui

ni, V

. Bag

lin,

P. C

olli

er, G

. Fer

ioli

, B. H

enri

st, N

. Hil

lere

t, B

. Jen

ning

er, J

.M. L

aure

nt, J

.M. J

imen

ez, K

. Wei

ss, F

. Zim

mer

man

n

SPS Machine as a vacuum test bench for theelectron cloud studies with LHC type beams

Strip detector