kévin pepitone 1clic project meeting, cern, december 1st, 2015 kevin pepitone, be-rf drive beam...
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Kévin Pepitone
CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF
Drive Beam Injector Gun
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Drive Beam Injector Gun
Kévin Pepitone
CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF
Low Energy Electron sourcefrom Thermionic Cathode
at High Intensity
Low Energy Electron sourcefrom Thermionic Cathode
at High Intensity
LEETCHI
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Status of LEETCHI for CLIC
Kévin Pepitone
CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF
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Outline
CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF
• Introduction and electron beam parameters
• Integration: experimental area, HV deck and control room
• Components: HV components and PLC system
• Diagnostics: electrical and optical diagnostics
• Simulations
• Perspectives
• Conclusions
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Introduction
CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF
Conceptual design report (EDMS 1234244)
LEETCHI
Parameters Baseline
Beam energy 140 keV
Beam current 5 to 7 A
Pulse length 140 µs
Emittance (RMS) < 20 mm mrad
Repetition rate 50 Hz
Beam power 4,9 to 6,9 kW
Shot to shot charge variation 0.1 %
Flat top charge variation 0.1 % after correction
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Electron beam parameters
CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF
Parameters Baseline
Beam energy 140 keV
Beam current 5 to 7 A
Pulse length 140 µs
Emittance (RMS) < 20 mm mrad
Repetition rate 50 Hz
Beam power 4,9 to 6,9 kW
Shot to shot charge variation 0.1 %
Flat top charge variation 0.1 % after correction
From a thermionic cathode
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Integration
CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF
162/R-002
6330
2750
CLINFTLA0100
High voltage
Relay Ross150 kV
Insulating transformer to produce 220 Vac
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Integration – Experimental area
CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF
HV deck connected to the -140 kV
High voltage DC power supply-200 kV/10 mA
Capacitor10 nF / 150 kV
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Integration – HV deck
CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF
Pulser power supply-1000 V at repetition rates up to 1 kHz
Bias power supply300 V / 450 mA
Heater power supply15 V / 10 A
PLC
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Cathode and connector
CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF
Ground
+
- 140 kV
Anode
Cathode
Electron beam
Grid
HV pulser-1000 V
Heater PS15 V, 10 A
Bias PS+300 V, 0.45 A
220 VInsulating transformer
220 V
++
+
Cont
rol i
nter
face
PL
COptical fibre
PLC in the control room
HV deck
CathodeCPI YU156
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Cathode and connector
CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF
+220 VInsulating transformer
-140 kV
Heater +
Pulser +
Pulser -
Heater -Bias -
Bias +
Vadim Soldatov
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Integration – Control room
CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF
Danish Ali Nawaz
PLC
Media converterVacuum gauges
PLC touch screen
HVPS remote
Ion pumps PS
Solenoids PS
Contactors
Delay generator
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Dump and Diagnostics
CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF
3D drawing (CATIA)
Graphite dump (diameter at the beginning : 40 mm, total
length : 390 mm)Copper holder with
water-cooling channels
Water
Alex Vamvakas
Energy deposition calculated with Geant4 for 140 keV, 5A, 140 µs electron beam
3D thermal analysis (ANSYS)
Energy deposition
0 20 40 60 80 100 120 140 1600
200
400
600
800
1000
Ede
p (
J/g)
r (µm)0 50 100 150 200 250 300 350 400
0.0
0.2
0.4
0.6
0.8
Ede
p (
J)
z (mm)
Integrated energy deposition as a function
of length
Cedric Delory
Northstar VD-150230 kV, 20 MHz
BergozACCT-S-C8
OTR with silicon carbide target 50 mm diameter
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Simulations
CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF
Current dependence of the emittance for the 8
mm cathode (EGUN)
MAGIC simulation example of the electron gun
Focusing coilBucking coil
Cathode r = 8 mm
r-z at 10 ns
Electrical field simulations in the cathode region to check
possible breakdown locations (Flux2D).
Maximum surface field 14 kV/cm
Jacques Gardelle, CEABruno Cassany, CEARomain Pecquois, CEASteffen Doebert
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Perspectives
CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF
Parameters Baseline
Beam energy 140 keV
Beam current 5 to 7 A
Pulse length 140 µs
Emittance (RMS) < 20 mm mrad
Repetition rate 50 Hz
Beam power 4,9 to 6,9 kW
Shot to shot charge variation 0.1 %
Flat top charge variation 0.1 % after correction
40 kV prototype of the modulatorDuring HV tests
Modular 7.5 kV board
-150µ -100µ -50µ 0 50µ 100µ 150µ 200µ 250µ 300µ 350µ
-40k
-30k
-20k
-10k
0
Tens
ion
(V)
Temps (s)
Voltage waveform on 4.5 kΩ resistive load
Ve
ETAGE N
ETAGE 2
ETAGE 1
S1
Sr1
Sn
Srn
S2
Sr2
Dch
Dch
Dch
Dch
Dch
Dch
Dbp
Dbp
Dbp
C
C
C
Vs
Ve
ETAGE N
ETAGE 2
ETAGE 1
S1
Sr1
Sn
Srn
S2
Sr2
Dch
Dch
Dch
Dch
Dch
Dch
Dbp
Dbp
Dbp
C
C
C
Vs
Ve
ETAGE N
ETAGE 2
ETAGE 1
S1
Sr1
Sn
Srn
S2
Sr2
Dch
Dch
Dch
Dch
Dch
Dch
Dbp
Dbp
Dbp
C
C
C
Vs
Schematic of the modulator during Charging and Discharging
Bruno Cassany, CEABaptiste Cadilhon, CEARomain Pecquois, CEA
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Conclusions
CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF
• Integration and installation of the gun in the area are completed• Vacuum is good• New components are expected:
Optical diagnosticDumpConnector
• The first tests with short pulses beams will be performed in 2016• The tests with long pulses at 50 Hz should be performed in 2016
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Thank you for your attention
CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF