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Task 2: High-gradient normal-conducting technology development. W. Wuensch EUCARD2 rf program review 18 July 2011. Task 2: Overall objectives Advance high-gradient, normal-conducting rf technology through development of: - PowerPoint PPT Presentation
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Task 2: High-gradient normal-conducting technology development
W. WuenschEUCARD2 rf program review
18 July 2011
Task 2: Overall objectives
• Advance high-gradient, normal-conducting rf technology through development of:
• two types of high-gradient CLIC structures - main linac accelerating structures and crab cavities
• high-power and beam-based X-band test infrastructure.
• Spread X-band and high gradient expertise to many labs – has been concentrated at CERN/KEK/SLAC
Rapidly spreading X-band and high-gradient technology
• Linear colliders: CLIC • Compact FELs: KVI Groningen, Trieste, Frascati, MaRIE• Compton-scattering light sources: MEGARAY• Medical accelerators: TERA, X-ray sources• Instrumentation: rf based high performance streak cameras
Task 2: Activity structure
CLIC main linac accelerating structures with wakefield monitors
• CEA •Manchester• PSI
X-band crab cavities
• Lancaster• Manchester• STFC
High-power and beam test infrastructure
• CEA• PSI• (Valencia)
Overall coordination: CERN
R.M. Jones, EuCARD2, CERN, 20th April 2011 5
Beam
Port11Port 2E-field
4. CLIC_DDS_A Match-out the full, tapered structure E-field and S11 shown
~198.6mm
Matching cell
Surface E-Field Axial E-Field
5.0
7.5
Es (
V/m
x10
4 )
Ez (
V/m
x10
4 )
z (mm) 0 300
7
z (mm) 0 225
R.M. Jones, EuCARD2, CERN, 20th April 2011 6
I/P at/2=15.9GHz
2. Work in Progress +Future Plans CLIC_DDS_A is equipped with mode launchers
–aim is to demonstrate ability to sustain HP CLIC_DDS_B includes full HOM ports Matching the HOM coupler for CLIC_DDS_B
(dipole band ~ 15.9 GHz – 18 GHz)
Sic
Sic
Construct pair of structures with full damping features
Moving to a high phase advance (HPA) structure allows other parameters to be optimised
5/6 phase advance structure design in progress
In the HPA design further features being explored
Additional manifold (8), add SiC?
EnhancedCoupling
Standard DDS Manifold
Additional Manifold
• CEA entered in the CLIC collaboration with the construction of
the Probe Beam Linac CALIFES in CTF3 (in 2005)
• Exceptional contribution of France to CERN
CTF3 contributions:
HV modulator and RF components for the CERN klystron
test stand and TBL line
Accelerating structures for the Two Beam Test Stand
Period : 2008 – 2012, Budget = 1 M€ - 48 persons-months
(p.m.)
Context of the X-band activities at CEA Saclay
7
HV Modulator RF ComponentsAccelerating structures (fabrication in progress)
8
Wakefield Monitors = Beam Position Monitors integrated to the accelerating structures Allows beam-based alignment of structures to remove wakefield effects and emittance growth Emittance growth very well improved by aligning the structure to an accuracy of 5 µm
RF absorber
High power coupler
TM-like modes
TE-like modes
WFM waveguide
Accelerating Structure features : TD24 (CERN design) without RF absorbers 100 MV/m accelerating gradient 24 tapered cells with 2/3 phase advance at 12 GHz with mean aperture of 5.5 mm dipole mode above 16 GHz
WFM features : WFM = Two coaxial rf pick-ups on the middle cell damping wg
on large side wg for TM-like modes on small side wg TE-like modes
Wakefield monitor development for CLIC accelerating structures
Hybrid HEM modes in the cell generated by an
offset beam
18 GHz DX
DY
GdfidL simulation of TM modes, beam offset dx = 1 mm
CLIC Crab Cavity R&D• CLIC-CC R&D:
– Multi-cell 11.9942 GHz dipole-mode cavity developed.
– Various mode damping schemes investigated:
• Choke• Waveguide
– An optimised 7-cell, waveguide damped design being investigated further.
• LLRF R&D:– CLIC-CC and LHC-CC phase control models under development.
1010
The 12 GHz Power station project at CEA Saclay
Modulator
Klystron
RF Pulse compressor
Test structure area
Main features: Modulator HT 430 kV Klystron 50 MW – 1.5 µs RF Pulse compressor SLED LLRF with fast phase
modulation
Specifications : RF Frequency: 12 GHzPeak power: 120 MWPulse length: 300 nsRepetition rate: 50 Hz
Independant operation to CTF3 Proximity with chemical lab and clean
room
WP tasks1. Design and fabricate multi-purpose RF Front Ends for WFM. Should be easily adaptable to different frequencies; 15 GHz, 18 GHz, 24 GHz Build hard-ware for CTF3 and SwissFEL injector.
2. Design and fabricate alternative WFM(s) for other structures (collaboration with CERN).
3. Test and commission the different RFFE and pick-ups with beam at CTF3 and SwissFEL injector.
Resources: Hardware: 6 RFFE ~ 120 kE; WFM ~ 80 kE.Manpower (PSI): Scientist/engineer 6 months, post-doc 2 years, technician ~ 2 years.+ CERN manpower (?)
Participating laboratories: CERN, PSIInfra-structures involved: CTF3, SwissFEL Injector
CLIC Crab High Power Distribution• Need to understand long term phase
stability of the distribution scheme• Requires an experiment to measure phase
transients.
Dual Output
or Magic
Tee
Laser interferometer
Waveguide with micron-level adjustment
Waveguide with micron-level adjustment
12 GHz Pulsed Klystron
( ~ 20 MW )Pulsed
Modulator Vector modulationControl
Control
travelling wave cavity
Phase Shifter
LLRFLLRF
main beam outward pick up
From oscillator 12 GHz
Oscillator
Main beam outward pick up
OriginalMP Invest MP Invest MP Invest MP Invest MP Invest MP Invest MP Invest
X-band Accelerating Structures 0.17 100000 3.75 465000 5.5 200000 3.75 40000 13.17 805000
CLIC crab cavity 0.17 3.75 40000 3.7 120000 1 8.62 160000
Travel 30000 5000 10000 45000 20000 5000 115000
Individual sums 60349.84 130000 417799.8 470000 976247.4 210000 898339.2 125000 443180.7 140000 119778.6 5000 21.79 1080000
Sum total
Country Switzerland France Switzerland UK UK UK
Calculation basis €/year 177499.52 111413.28 177499.52 119778.56 119778.56 119778.56
TOTALULAN STFC
3,995,695.43 €190,349.84 € 887,799.80 € 1,186,247.36 € 1,023,339.20 € 583,180.67 € 124,778.56 €
Task CERN CEA PSI UMAN
• Broad range of participants, many activities• Extension of ongoing EUCARD activities• Recent expression of interest also by the University of Valencia
75%MP Invest MP Invest MP Invest MP Invest MP Invest MP Invest MP Invest
X-band Accelerating Structures 0.17 0 3.75 465000 4 140 3 3000 10.92 468140
CLIC crab cavity 0.17 2 32000 3.6 40000 0.8 6.57 72000
Travel 20000 5000 5000 16000 20000 5000 71000
Individual sums 60349.84 20000 417799.8 470000 709998.1 5140 598892.8 51000 431202.8 60000 95822.85 5000 17.49 611140
Sum total
Country Switzerland France Switzerland UK UK UK
Calculation basis €/year 177499.52 111413.28 177499.52 119778.56 119778.56 119778.56
2,925,206.18 €
ULAN STFC TOTAL
80,349.84 € 887,799.80 € 715,138.08 € 649,892.80 € 491,202.82 € 100,822.85 €
Task CERN CEA PSI UMAN
• CERN request reduced to coordination manpower only• Roughly flattens €/lab/activity to 350-400k• Activities are stretched, posts are lost, but primary deliverables are maintained
50%MP Invest MP Invest MP Invest MP Invest MP Invest MP Invest MP Invest
X-band Accelerating Structures 0.17 0 3 350000 3 80 6.17 350080
CLIC crab cavity 0.17 1 10000 3 25000 0.8 4.97 35000
Travel 20000 5000 5000 13000 5000 48000
Individual sums 60349.84 20000 334239.8 350000 532498.6 5080 119778.6 15000 359335.7 38000 95822.85 5000 11.14 433080
Sum total
Country Switzerland France Switzerland UK UK UK
Calculation basis €/year 177499.52 111413.28 177499.52 119778.56 119778.56 119778.56
1,935,105.32 €
TOTAL
80,349.84 € 684,239.84 € 537,578.56 € 134,778.56 € 397,335.68 € 100,822.85 €
Task CERN CEA PSI UMAN ULAN STFC
• Participation of certain participants in certain activities have been eliminated.• Some deliverables are eliminated • Need to ask the question whether we are below minimum worthwhile level for further participant-activities.
OriginalMP Invest MP Invest MP Invest MP Invest MP Invest MP Invest MP Invest
X-band Accelerating Structures 0.17 100000 3.75 465000 5.5 200000 3.75 40000 13.17 805000
CLIC crab cavity 0.17 3.75 40000 3.7 120000 1 8.62 160000
Travel 30000 5000 10000 45000 20000 5000 115000
Individual sums 60349.84 130000 417799.8 470000 976247.4 210000 898339.2 125000 443180.7 140000 119778.6 5000 21.79 1080000
Sum total
Country Switzerland France Switzerland UK UK UK
Calculation basis €/year 177499.52 111413.28 177499.52 119778.56 119778.56 119778.56
75%MP Invest MP Invest MP Invest MP Invest MP Invest MP Invest MP Invest
X-band Accelerating Structures 0.17 0 3.75 465000 4 140 3 3000 10.92 468140
CLIC crab cavity 0.17 2 32000 3.6 40000 0.8 6.57 72000
Travel 20000 5000 5000 16000 20000 5000 71000
Individual sums 60349.84 20000 417799.8 470000 709998.1 5140 598892.8 51000 431202.8 60000 95822.85 5000 17.49 611140
Sum total
Country Switzerland France Switzerland UK UK UK
Calculation basis €/year 177499.52 111413.28 177499.52 119778.56 119778.56 119778.56
50%MP Invest MP Invest MP Invest MP Invest MP Invest MP Invest MP Invest
X-band Accelerating Structures 0.17 0 3 350000 3 80 6.17 350080
CLIC crab cavity 0.17 1 10000 3 25000 0.8 4.97 35000
Travel 20000 5000 5000 13000 5000 48000
Individual sums 60349.84 20000 334239.8 350000 532498.6 5080 119778.6 15000 359335.7 38000 95822.85 5000 11.14 433080
Sum total
Country Switzerland France Switzerland UK UK UK
Calculation basis €/year 177499.52 111413.28 177499.52 119778.56 119778.56 119778.56
1,935,105.32 €
TOTAL
80,349.84 € 684,239.84 € 537,578.56 € 134,778.56 € 397,335.68 € 100,822.85 €
2,925,206.18 €
Task CERN CEA PSI UMAN ULAN STFC
ULAN STFC TOTAL
80,349.84 € 887,799.80 € 715,138.08 € 649,892.80 € 491,202.82 € 100,822.85 €
Task CERN CEA PSI UMAN
TOTALULAN STFC
3,995,695.43 €190,349.84 € 887,799.80 € 1,186,247.36 € 1,023,339.20 € 583,180.67 € 124,778.56 €
Task CERN CEA PSI UMAN
