WP12: Innovative RF
Technologies
EUCARD-2 Steering Committee
Daresbury Laboratory, 19 Mar 2014
Co-ordinators:
Peter McIntosh (STFC Daresbury Laboratory)
Nicoleta Baboi (DESY)
Juliette Plouin (CEA)
EuCARD-2 is co-funded by the partners and the European Commission under Capacities 7th Framework Programme, Grant Agreement 312453
Task 12.1 Management &
Coordination (P McIntosh – STFC)
• WP12 Annual Review being arranged:
– 16-17 April 2014 @ CEA Saclay
– https://indico.cern.ch/event/301619/
• Milestones:
– MS73, Commissioning of the SAPI for operation with metal
photocathodes, STFC, Completed
– MS74, Design concept RF front end, PSI, Under Preparation, Due M12
– MS75, Investigation of quantum yield and energy spectrum of the
electrons, emitted from the metal photocathode surface in SAPI, STFC,
Due M18
• Deliverables for M18:
– D12.1, Deposition test facilities implemented and verified at CERN and
INPG, CERN.
– D12.2, Initial progress report of task 12.3, CERN.
– D12.3, Design of electronics for XFEL HOM diagnostics, DESY.
– D12.4, Scientific report on photocathode R&D, STFC.
Task 12.2 Thin Films
(C Antoine – CEA)
ALD @ INP Grenoble
CEA Saclay
• Modification of the magnetometer underway
INP Grenoble
• ALD deposition set-up delivered
• CVD deposited NbN samples have been characterized.
CERN
• Sample study ongoing w. Sheffield U. to study biased HIPIMS
HZB Berlin
• Quadrupole resonator close to final fabrication (presently
BCP at JLAB)
• Design of a special sample holder for small flat sample
underway
Progress since May 2013 will be presented at the April WP12 meeting
Task 12.3 High Gradient NC
(W Wuensch – CERN)
Recruitment:
• CEA Saclay – Post-doc hired, begins in April.
• Lancaster – Two PDRAs hired, began in January
• PSI – Post-doc hired, began in November
Upcoming deliverables:
• D12.2 Initial progress report M18 – dedicated effort to begin in four
months or so.
Technical progress highlights:
• PSI has made initial beam-based measurements and evaluated optical
components.
• Lancaster has tuned crab-cavity.
• CEA Saclay has made preliminary particle studio simulations of klystron.
Overall assessment
• Lengthy process of finding and hiring means that real momentum on
technical work is just beginning. Nonetheless all work plans have been
studied in sufficient detail to allow technical work to start.
Task 12.4: HOM Beam
Diagnostics (R Jones – UMAN)
•
•
•
Aim: HOM-based beam phase and position
diagnostics for the E-XFEL SC cavities
(1.3 and 3.9 GHz)
Experimental work:
– HOM Measurements at FLASH to study
stability of signals, correlation to detuning
(1.3 GHz cavities)
– Design of electronics for 1.3 and 3.9 GHz
electronics for the E-XFEL on going
– Recently FNAL electronics commissioning: 3.9 GHz cavities/FLASH
Staffing:
– 1 UMAN Ph.D. student, L. Shi, based at DESY since Aug. 2013 participating in
measurements and working closely with N. Baboi
– 1 UROS Ph.D. student, T. Flisgen, focused on complete module simulation and
implications of fabrication and measurement errors via customised codes
– 1 PDRA Dr. P. Jain, based at Manchester since April 2013 focused on module and HOM
beam-excitation simulations. He has also spent 1 week at DESY participating in
experiments
WP 12.5 RF Photocathodes
HZB
• Study high brightness PCs, with high average
current, SRF gun integration processes.
– Diamond Amplifier Cathode (DAC) and Diamond Field
Emitter Array (DFEA) photocathodes.
•
FE system setup to study PC materials and
substrates. DFEA PCs currently being evaluated.
DESY and NCBJ
• SRF gun cavity tested at DESY/Jlab upto cathode
field of 55 MV/m. Improved Pb PC plug cooling
incorporated.
• New Pb PC diagnostic being prepared at NCBJ.
STFC
• New metal PC preparation/analysis system
commissioned, provides Spectroscopy, AFM,
work function and QE characterisation.
• MS74 details system and its commissioning.
HZDR
• New SRF gun to be installed on ELBE in May 14.
• 4 x Nb plugs polished and will be Pb coated by
NCBJ.
UHV Arc Deposition
Ion Bombardment Rod Plasma Injection
6
Milestones and Deliverables
due up to M12 (30.04.2014)
Report
no.
(D/M)
MS73
MS74
Title
Commissioning of the SAPI for
operation with metal
photocathodes.
Design concept RF front end.
Beneficiary
Due date
Status
STFC
M8
(31-12-13)
Completed M9
(30-01-14)
M12
(30-04-14)
Delayed to M14
(31-06-14)
Due to delayed
post-doc
appointment.
PSI
Summary on Communication
• Scientific papers submitted relevant to the project
Author
Title
Link
C.B. Baumier (IPNO)
Task 12.2
Multilayers Activities at Saclay / Orsay
SRF 2013
http://ipnweb.in2p3.fr/srf2013/paper
s/weioc02.pdf
M Dehler (PSI)
Task 12.3
Wake field monitors in a multi purpose X Band
accelerating structure
IBIC13:
http://accelconf.web.cern.ch/AccelCo
nf/IBIC2013/papers/webl3.pdf
T Flisgen (UROS)
Task 12.4
Scattering parameters of the 3.9 GHz accelerating
module in a free-electron laser linac: A rigorous
comparison between simulations and measurements
Phys. Rev. ST Accel. Beams 17, 022003
(2014)
R. Barday (HZB)
Task 12.5
Characterization of a superconducting Pb photocathode
in a superconducting rf photoinjector cavity
Phys. Rev. ST Accel. Beams 16, 123402
– Published 6 December 2013
• Attended events (with EuCARD-2 presentation)
Title of event
Date
Venue
Outreach
event?
CLIC Workshop
5/2/14
CERN
N
Attendance
Link to event or report
All Task 12.3
Collaborators
http://indico.cern.ch/event/275412/
Summary on Communication - 2
• Upcoming events (workshops, meetings, etc.)
Title of event
Date
Venue
Link
WP12 Annual Review
16-17 Apr 2014
CEA Saclay
https://indico.cern.ch/event/301619/
IPAC14
16-20 Jun 2014
Dresden
http://www.ipac14.org/
• Potential topics/results for Accelerating News
– Performance breakthrough for SRF thin film, utilising multilayer, high Tc technologies.
– Breakdown free performance capability demonstrated for
>100MV/m NC RF structures.
– High performance beam position diagnostic demonstrated
for XFEL.
– High performance (intensity, emittance) photocathodes
demonstrated for SRF and NC applications.
WP12 Website
WP12 website can be found here: http://www.cockcroft.ac.uk/events/WP12/