diamonds for beam instrumentation
DESCRIPTION
Diamonds for Beam Instrumentation. TIPP 2011, Chicago, 9.6.2011 Erich Griesmayer CERN and CIVIDEC Instrumentation. Overview. Diamond Detectors Physics Application Examples Summary. The Diamond Detector. Substrate. Diamond Substrate: pCVD = 10x10 mm 2 x 0.5 mm - PowerPoint PPT PresentationTRANSCRIPT
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Diamonds for Beam Instrumentation
TIPP 2011, Chicago, 9.6.2011
Erich Griesmayer
CERN and CIVIDEC Instrumentation
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Overview
• Diamond Detectors• Physics• Application Examples• Summary
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The Diamond Detector
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Diamond Substrate:
pCVD = 10x10 mm2 x 0.5 mmsCVD = 5x5 mm2 x 0.5 mm
10 mm Next transparency
Substrate
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pCVD Substrate
500 um
Crystal boundaries, 100 – 200 um
Charge-collection distance 200 um
Trapping
Reduction of ionization charges
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Diamond Detectors
pCVD sCVD
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Diamond Beam Monitor
Detector AC/DC Splitter 2 GHz Amplifier
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Physics
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Principle of Ionization
13 eV/eh-pair1.6 fC/MIP
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Modes of Operation
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Proton Interaction
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Proton Interaction
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Proton Interaction
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Proton Interaction
Traversing Absorption
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Proton Interaction
Single particles
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Proton Interaction
Single particles
Absorption
Particle bunches
Absorption
Single particles
Traversing
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Proton Interaction
Single particles
Absorption
Particle bunches
Absorption
Single particles
Traversing
LHCTEVATRON
P.T.ISOLDE
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Electron Interaction
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Electron Interaction
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Electron Interaction
400
Single particles
Absorption
Particle bunches
Absorption
Single particles
Traversing
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Neutron Interaction
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Photon Interaction
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Photon Interactionpe
r 10
0’00
0 ph
oton
s
IonizationExcitation
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Applications
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Beam Instrumentation Detectors Protons- Beam Loss / Position / Profile Monitors
Electrons- Beam Loss Monitors
Photons- Beam Position Monitors (SLS, XFEL)
Neutrons- Flux monitors (14 MeV fusion, radiation protection)
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Application Example 1:
PROTONS
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Proton Therapy
IBA Cyclotron in Orsay
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Proton Therapy
Energy calibration
IBA Cyclotron
50 MeV – 200 MeV
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Proton Therapy
Beam structure
100 mV/div20 ns/div
9 ns RF period
200 MeV protons, 106 MHz RF
IBA Cyclotron
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Proton Therapy
Phase measurement
10 ns/div200 MeV protons, 106 MHz RF
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Proton Therapy
10 ps phase resolution
3° = 80 ps phase stability
Phase measurement
IBA Cyclotron
10 ns/div200 MeV protons, 106 MHz RF
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CERN ISOLDE – Heavy Ions
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Heavy Ions
10 ns/div50 mV/div
Calorimetric spectroscopy
dE/E = 0.6%Energy resolution
23 MeV C-ions
REX ISOLDE
Energy
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LHC - Diamond Beam Loss Monitor
LHC – Collimation Area – IP7
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Unexpected beam abort (“UFO”)
LHC - DBLM
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1 ms
DBLM
Ionization Chambers
LHC - DBLM
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1 ms
DBLM
Ionization Chambers
LHC - DBLM
Zoom for next transparency
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LHC - DBLM
100 us
Zoom x10
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10 us
LHC - DBLM
Zoom x100
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LHC - DBLM
1 us
Zoom x1000
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LHC - DBLM
100 ns
Zoom x10’000
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Application Example 2:
Neutrons
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Neutron Measurement
n_TOF experiment at CERN: thermal to GeV neutrons
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Neutron Measurement
500 us/div200 mV/div
6 MeV to GeV neutron time-of-flight
n_TOF at CERN
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Neutron Measurement
n n p
Measurement of n and n p interactions
Pulse shapes of interactions
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Application Example 3:
Photons
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Medical LINAC
AKH ViennaX-rays: 6 MV – 25 MVDose-rate: 4 Gy/minCourtesy: D. Georg
Water phantomDiamond Detector
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10 MeV Photons
Depth-dose profile measurement
1% agreement with a reference Thimble Ionization Chamber
2.5 ms bunch rate
Single photon bunch of 2 us
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Summary
• Radiation resistance• Fast 10 ps time resolution, 360 ps for single
particles• High sensitivity single particles with +40 dB• High dynamic range attenuation -40 dB• Protons – electrons – neutrons – photons• BLM, BPM, Counter, Spectroscopy, Phase• Many other potential applications…..
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Conclusion
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Thank you for your attention !
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CVD Parameter
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Radiation Hardness24 GeV protons