methods for measuring the beam profile in high intensity beams
DESCRIPTION
METHODS FOR MEASURING THE BEAM PROFILE IN HIGH INTENSITY BEAMS. Charlotte Roose www.europeanspallationsource.se May 8, 2014. EUROPEAN SPALLATION SOURCE. An European multi-disiplinary research centre based on the world’s most powerful neutron source . - PowerPoint PPT PresentationTRANSCRIPT
METHODS FOR MEASURING THE BEAM PROFILE IN HIGH INTENSITY BEAMS
Charlotte Roosewww.europeanspallationsource.se
May 8, 2014
EUROPEAN SPALLATION SOURCE
An European multi-disiplinary research centre based on the world’s most powerful neutron source
Accelerator LINACParticle Proton
Max Energy 2 GeV
Power 5 MW
Current 62.2mA
Pulse length 2.86 ms
Pulse frequency 14 Hz
Hosted by Sweden (source facility) and Danemark (data management facility)
SITE
Start the construction this year !!
ACCELERATOR
Spokes Medium β High βDTLMEBTRFQLEBTSource HEBT & Contingency Target
2.4 m
4.6 m
3.8 m
39 m
56 m
77 m
179 m
75 keV
3.6 MeV 90 MeV 216
MeV571 MeV
2000 MeV
352.21 MHz
704.42 MHz
2019: Start operation with linac completed up to medium β 600 MeV
2020: Reach > 1MW
2022: Install high β
2025: Full project specifications: 5MW, 2 GeV
Warm linac Cold linac
Deadline for the transverse beam profile monitors
Non-invasive Profile Monitor (NPM)
Spokes Medium β High βDTLMEBTRFQLEBTSource HEBT &
Contingency Target
2.4 m
4.6 m
3.8 m
39 m
56 m
77 m
179 m
75 keV
3.6 MeV 90 MeV 216
MeV571 MeV
2000 MeV
352.21 MHz
704.42 MHz
10-7 - 10-8 mbar 10-9mbar
Luminescence profile monitor Ionisation profile monitor
Use the interaction between the beam and the residual gas (Hydrogen)
Warm linac Cold linac
1 112 413
NPM – Luminescence Profile Monitor
• Space of 10 cm maximum• 10-7 - 10-8 mbar
Ion beam
Viewport
(1) Picture Setup@ Zerstörungsfreie Profilmessung intensiver Schwerionenstrahlen, Frank Becker, Darmstadt, 2010
(1)
NPM – Ionisation Profile Monitor
• 40 cm of space or less• Dimension = 10cm x10cm x 10cm• Electric field of 60kV/10cm• 10-9mbar
(1) Picture Setup@GSI, T. Giacomini
(1)
NPM – Ionisation Profile Monitor
(1) Picture Setup@GSI, T. Giacomini
(1)
SPACE CHARGE EFFECT
With the 60kV/10cm, the ion deviation of 10% for a 1 GeV beam of 2mm diameter
∆5cm
Other options• Increase the electric field• Use an additional magnetic field
NPM
(1) Picture Setup@GSI, T. Giacomini
(1)
RADATION HARDNESS
• Decision of components depend of their liftime : • Viewport• Luminescence screen • Camera, PMT
Thank you for your attention