mike dykes - cells
TRANSCRIPT
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
ERLP Status
Mike Dykes
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Content
• ASTeC RF & Diagnostics Group• Work of the Group• 4GLS• ERLP
– Photo-injector– Accelerating Modules
• Summary
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
High Power RF Engineering
Andy Moss
Joe Orrett
Peter Corlett James Rogers
Bob Bate
SRS Support; DIAMOND; ERLP; MICE; TTF assembly and re-commissioning
High Power Amplifiers
Transmission lines
Medium Power
Monitoring
Cryogenics
Cryo-module assembly
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Low Power RF & Diagnostics
Rob Smith
Alex Kalinine
Vacancy Mike Dufau Steve Buckley
Vacancy
SRS Support; DIAMOND; ERLP; Linear Collider
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Structure Design
Carl Beard
Emma Wooldridge James Rogers Vacancy
Linear Collider; Underpinning Technology: 4GLS; ERLP
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
SRS Support
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Diamond Support
2004/05
Design and Procurement of Linac; booster RF; storage ring RF and diagnostics
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Linear Collider -FONT
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Linear Collider – ‘Crab’ cavity
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Muon Ionisation Cooling Experiment
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
MICE
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
4GLS combines, for the first time, superconducting ERL, SR and FEL technology in a fully integrated
multi-source facility
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
The benefits...
short pulses - femtosecond (10-15s) regimecontrol of pulse structure - pulse tailoringlarger peak currentseffectively infinite beam lifetimescoherencesymmetrical beam and small emittance
and, of course, the ERL approach combined with high brightness injectors are ideal for
free electron lasers, FELs.
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
A suite of light sources...
• spontaneous emission sourcesundulators and bending magnets
• stimulated emission sourcesfree electron lasers
• combinations of sourcesinternal or with conventional lasers
laser
laser
laser
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
4GLS Sources
1.E+10
1.E+14
1.E+18
1.E+22
1.E+26
1.E+30
0.001 0.01 0.1 1 10 100 1000Photon energy, eV
Peak
Brig
htne
ss p
h/(s
.0.1
%bp
.mm
2 .mra
d2 )
VUV-FEL
XUV-FEL
Bending Magnet
coherent enhancement Undulators
IR-FEL harmonic
FIR FELRange:
5-75µmMicropulse energy: ~75 µ JPulse lengths 100s fs - few psVariable polarisation
VUV FELRange:
3-10 eV??Photons per pulse: 1013
Pulse energy: ~15 µJPulse length 100s fsVariable polarisationRepetition rate: ??
XUV FELRange:
fundamental 10-100 eV??harmonic output to 300eV
Photons per pulse: 1014
Pulse energy: ~2 mJPulse length 100s fs
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
In summary, 4GLS offers...
4GLS will deliver very short, very bright pulses of coherent light that are tuneable over a wide range and have variable polarisation.
fs - timescale of bond making and disruption
More than a million times brighter than the peak brightness of a 3rd generation storage ring
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Research, Development and Design
Four years of funding (currently £14.7M) for the research, development and design work needed to address the key challenges of the 4GLS facility.
• establish and operate 4GLS ERL prototype facility
• undertake 4GLS design studies
• collaborate where other international efforts are directed at addressing problems of common interest
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
4GLS ERL Prototype
Aims: To enable the development of core skills and to gain ‘hands on’ experience to meet the 4GLS challenge.
high brightness photoinjectorssuperconducting linac technologyFEL and spontaneous source operation togetherelectron beam dynamics issuessynchronisation challenges
The work will be cross departmental and will involve ASTeC, SRD, CLF, ED, ID and HEIs.
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Light
AccelPass 1
Photon Generator
e- Injector
Arc
Dump
Linac
DecelPass 2
Generic 1.5 Turn ERL
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
ERLP
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Parameters
Parameter Set up Mode Short Pulse Long Pulse CW
Gun Energy (keV) 350Booster Energy (MeV) 8.35
Final Energy (MeV) 35Max. Bunch Charge (pC) 80
Bunch Repetition Rate (MHz) 81.25Bunches per Train 1 1625 8125Train Length (µs) 0.0123 20 100
Train Repetition Rate (Hz) 20 5 20Average Current (µA) 0.0016 0.65 13 6500
Beam Power at 8.35 MeV (W) 0.0134 5.43 108.55 54275Beam Power at 35 MeV (W) 0.056 22.75 455 227500
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
ERLPrototype
4GLS
NWDAScience Park
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
ERLP
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Injector Layout
Gun Assembly
Booster Cavity
Buncher Cavity
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Gun
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Gun
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Gun
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Gun Power Supply
• Glassman PK500N008GD5
• Voltage -500 kV• Current 8 mA• Cockcroft-Walton based multiplier
• Delivered December 2003
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Gun Power Supply
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
SF6 Tank
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Vacuum
Light Box
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Laser
• Basic laser delivered and set up at CLF, but far from complete
• Still need system to provide macro pulses
• Power 10 W in Infrared5 W in Green
• Pulse width 6 – 7 ps in Green• Repetition Rate 81.25 MHz (CW)• Jitter <0.5 ps• Beam Quality M2 <1.2
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Laser
• Wavelength: 1.05µm, multiplied to 0.53µm/0.26µm (NdY:VO4)
• Pulse energy: 80nJ on target
• Pulse duration: 10ps FWHM
• Pulse repetition rate: 81 MHz
• Macropulse duration: 20 ms
• Duty cycle: 0.2%
• Timing jitter: <1ps
• Spatial profile: circular (top hat) on photocathode
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Laser
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Buncher Cavity Requirements
• Single Cell• 1.3 GHz• Longitudinal bunch compression• No Acceleration• Zero-phase crossing angle
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Design Options
ELBE Design
Copy of the buncher used at ELBE.
EU Cavity
A scaled version of the 500 MHz HOM Damped cavity.
Cornell Design
Based on a scaled version of the PEPII cavity.
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Field Profile
Buncher Electric Field
0
5000000
10000000
15000000
20000000
25000000
30000000
35000000
40000000
45000000
50000000
-150 -100 -50 0 50 100 150Distance (mm)
Elec
tric
Fie
ld S
tren
gth
(Arb
itrar
y U
nits
)
CornellELBEEU
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
ELBE
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Installed at ELBE
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Buncher RF Power System
D C
BuncherCavity
R
F
Solid State 1.3GHz 200W AMP
SS1REVP
SS1FWDP
Cavity TuningMechanism
COAXIALLINE
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Booster Cavity
• Order placed 23rd March – Accel• Rossendorf Module – two TESLA
cavities• Energy Gain 8 MeV• Independent control of Qext
• Independent control of cavity phase
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Booster Cavity
ELBE Type Cryostat with dual Tesla Linac Sections
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Booster Cavity
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
TESLA Cavity
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Booster RF Power System
1.3 GHzIOT
16kW
Circulator
Load1
BoosterCavity 1
BoosterCavity 2
D C2
R
FD C
4R
F
StepperMotor
Control
3 StubTuner
StepperMotor
Control
3 StubTuner
D C3
R
F
IOT1REVP
IOT1FWDP
WG2REVP
WG2FWDP
WG3REVP
WG3FWDP
CavityTuning
Mechanism
CavityTuning
Mechanism
Water FlowInterlock
Water TemperatureInterlock
ElectricalMonitoring
TemperatureMonitoring1.3 GHz
IOT16kW
Circulator
Load1
D C1
R
F
IOT1REVP
IOT1FWDP
Water FlowInterlock
Water TemperatureInterlock
ElectricalMonitoring
TemperatureMonitoring
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Linac Module
• Order placed 23rd March – Accel• Rossendorf Module – two TESLA
cavities• Energy Gain 26.65 MeV• Independent control of Qext
• Independent control of cavity phase
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Linac Module
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Cryogenics
Bulk Helium Supply
2 K Pumping System
Bulk Helium Supply
2 K Pumping System
Gas Recovery
Gas Bag & Bauer HP
compressor
Cost D
Bulk liquid
HP gas recovery
Gas Recovery
Gas Bag & Bauer HP
compressor
Cost D
Bulk liquid
HP gas recovery
No Gas Recovery
Cost E
Bulk liquid
No Gas Recovery
Cost E
Bulk liquid
Cost A
Closed Loop System
Closed Loop System
Cost A
Closed Loop System
Closed Loop System
Gas Recovery
Gas feed directly into
liquefier compressor
Cost B
Liquefier
IP gas recovery
2 K Pumping System
Liquefier
Gas Recovery
Gas feed directly into
liquefier compressor
Cost B
Liquefier
IP gas recovery
2 K Pumping System
Liquefier
2 K Pumping System
Liquefier
Gas Recovery
Gas feed directly into
liquefier compressor
Cost C
Wiggler Liquefier
IP gas recovery
2 K Pumping System
Modify the Wiggler System
Liquefier
Gas Recovery
Gas feed directly into
liquefier compressor
Cost C
Wiggler Liquefier
IP gas recovery
2 K Pumping System
Modify the Wiggler System
Liquefier
Gas
Reco
very
2 K
Refri
ger’n
4 K
Refri
ger’n
Gas
Reco
very
2 K
Refri
ger’n
4 K
Refri
ger’n
Gas
Reco
very
2 K
Refri
ger’n
4 K
Refri
ger’n
Gas
Reco
very
2 K
Refri
ger’n
4 K
Refri
ger’n
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Cryogenics
Cold Box
Gas Buffer Tank
Pressure control
Compressor
Helium Liquefier
Cold Box
Gas Buffer Tank
Pressure control
Compressor
Helium Liquefier
TXLX
BoosterCavity
TXLX TXTXTXLXLXLX
BoosterCavity
Helium dewarHelium dewar
TXLX TXTXTXLXLXLX LCVLCV
RecuperatorH02
LCVLCVLCVLCVLCVLCV
RecuperatorH02
LINAC Cavity
Gas Heater
PXPCV
E
2 K Pumping System
Gas Heater
PXPXPXPCVPCVPCV
EEE
2 K Pumping System
EQUIPMENT LIST
1. Liquefier
2. Gas buffer tanks
3. Recuperator H02 & control valves LCV
4. Gas Heater plus control
5. Pump system
6. Pressure control system (PCV, PX & controller)
7. Dewar pressure regulation (not shown)
8. Liquid helium dewar
9. Transfer lines
10.Pumping lines
11.Control System
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Revised Specification
StaticDuty
DynamicDuty
TotalDuty
Time Averaged
TOTAL SYSTEM
Cavities 45.1 161.3 206.4 litres / hour
Main transfer lines 24.4 24.4 litres / hour
Other equipment 12.8 12.8 litres / hour
Total consumption 82.3 161.3 243.6 109 litres / hour
1650 974 2620 litres / day
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Linac RF Power System
1.3 GHzIOT
16kW
Circulator
Load3
-3dBHybridcoupler
VariablePhaseShifter
LinacCavity
1
LinacCavity
2
-3dB-3dB
D C6
RF
StepperMotor
Control
D C7
R
F
StepperMotor
Control
3 StubTuner
3 StubTuner
D C5
RF
IOT2REVPIOT2FWDP
WG5REVPWG5FWDP
WG6REVPWG6FWDP
Cavity TuningMechanism
Water Flow Interlock
Water TemperatureInterlock
ElectricalMonitoring
TemperatureMonitoring
Load4
Cavity TuningMechanism
StepperMotor
Control
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
DC Power Supply
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
IOT 116LS
e2vFrequency 1.3 GHz
Output Power 16 kW
Gain 20 dB
Efficiency 60 %
Beam Voltage 25 kV
Height 982 mm
Width 604 mm
Depth 400 mm
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
e2v IOT
• 1st prototype power tested 21/06/04• Design power 16kW• Design frequency 1.3/1.5GHz• Conservative gun design• Input cavity with large adjustment• Output cavity with adjustable tuner• Result Power 20kW; 50% efficiency
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Programme
• Laser installed Nov 04• Gun assembled Feb 05• Cryogenics installed Jul 05• Booster cavity delivered Oct 05• Linac cavity delivered Dec 05• 1st beam Apr 06
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Mike Dykes ESLS RF Meeting 29 -30 September 2004
Further Information
Collaborations:
Prof Elaine Seddon
http://www.4gls.ac.uk