N. Baboi, DESY EuCARD WP10 Kick-off Meeting, 24 Mar. 2009 HOM-couplers (pick-ups) 10.5.1 HOMBPM -...
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Transcript of N. Baboi, DESY EuCARD WP10 Kick-off Meeting, 24 Mar. 2009 HOM-couplers (pick-ups) 10.5.1 HOMBPM -...
N. Baboi, DESYN. Baboi, DESY EuCARD WP10 Kick-off Meeting, 24 Mar. 2009EuCARD WP10 Kick-off Meeting, 24 Mar. 2009
HOM-couplers (pick-ups)
10.5.1 HOMBPM - Overview10.5.1 HOMBPM - Overview
• Purpose: on-line measuring device for• 1. beam alignment on the axes of the 3.9GHz cavities
(& 1.3 GHz cavities) in FLASH (&XFEL&ILC)• 2. measurement of beam position at the cavity locations
• Task: • develop, build, test electronics for 3.9 GHz cavities• interpret signals and integrate in control system• measure cavity alignment
• HOM-couplers• one at each cavity end• enable monitoring the
HOMs excited by beam
N. Baboi, DESYN. Baboi, DESY EuCARD WP10 Kick-off Meeting, 24 Mar. 2009EuCARD WP10 Kick-off Meeting, 24 Mar. 2009
10.5.1 HOMBPM - Motivation10.5.1 HOMBPM - Motivation
• Beam alignment:• wakefields/HOMs: excited by the beam can lead to
worse beam quality• measure to reduce WF: beam alignment on the axes of
the accelerating cavities• particularly critical in the 3.9 GHz cavities
• Beam position measurement:• cavities & HOM couplers exist comes for free
(no new vacuum component needed)
• dipole modes ~ beam offset
N. Baboi, DESYN. Baboi, DESY EuCARD WP10 Kick-off Meeting, 24 Mar. 2009EuCARD WP10 Kick-off Meeting, 24 Mar. 2009
10.5.1 HOM-BPMs at the TESLA Cavitiesin FLASH
10.5.1 HOM-BPMs at the TESLA Cavitiesin FLASH
•HOM-BPMs at 1.3GHz cav.• use dipole mode at 1.7 GHz• installed in 5 accelerating
modules (40 cavities)• calibration: with SVD technique
− problem: unstable in time
•Beam alignment in modules• routinely used in FLASH
•XFEL: plan to install • in some 1.3 GHz and in all 3.9 GHz cavities
•Other studies• cavity alignment in cryo-module• beam phase measurement with monopole modes at ~2.4GHz
N. Baboi, DESYN. Baboi, DESY EuCARD WP10 Kick-off Meeting, 24 Mar. 2009EuCARD WP10 Kick-off Meeting, 24 Mar. 2009
10.5.1 Milestones and Deliverables10.5.1 Milestones and Deliverables
Deliverables Description/title Nature1 Delivery month2
10.5.1.1Prototype of HOMBPM electronics and code to probe beam centering on 3.9 GHz cavities P 40
10.5.1.2 Report on experimental method and code R 48
Milestones Description/title Nature1 Delivery month2
10.5.1.1 HOM alignment for 3.9 GHz cavity electronics verification
D 40
10.5.1.2 Final report R 48
1=prototype; R=report
N. Baboi, DESYN. Baboi, DESY EuCARD WP10 Kick-off Meeting, 24 Mar. 2009EuCARD WP10 Kick-off Meeting, 24 Mar. 2009
10.5.1 Costs10.5.1 Costs
Year FTEs
person
-mon
ths
Direct costs Indirect costs
Total costs
Requested EC
Person
nel
Du
rable eq
uip
men
t
Con
sum
able an
d p
rototype
Travel
Total d
irect
Person
nel
Material an
d travel
Total in
direct
(€) (€) (€) (€) (€) (€) (€) (€) (€) (€)
EU post-
doc F
DESY
P D C T
D=P+
I T= D+I R < D/3 F D+C+T
1 0.50 0.30 9.60 59520 0 15000 2500 77020 35712 10500 46212 123232 38000
2 0.50 0.30 9.60 59520 0 15000 2500 77020 35712 10500 46212 123232 38000
3 0.50 0.30 9.60 59520 0 15000 2500 77020 35712 10500 46212 123232 38000
4 0.00 0.52 6.20 38465 0 5000 2500 45965 23079 4500 27579 73544 10600
Total 2.92 35.00 217000 0 50000 10000 277000 130200 36000 166200 443200 124600
N. Baboi, DESYN. Baboi, DESY EuCARD WP10 Kick-off Meeting, 24 Mar. 2009EuCARD WP10 Kick-off Meeting, 24 Mar. 2009
10.5.1 Initial Planning10.5.1 Initial Planning
Year Deadline (approx)
Work
1 2009-06-01 Employ post-doc (0.5 FTE)
2009-07-31 Meeting at DESY
2009-12-31 Define requirements for HOMBPMs for 3.9GHz cavities
2 2010-06-30 Study HOMs in the 3.9GHz cavities at FLASH
2010-12-31 Design electronics & LO
2010-12-31 Meeting (where?)
2010-06-30 Test electronics
3 2011-03-31 Measurement alignment
2011-09-30
2012-03-31 HOMBPM Calibration
4 2012-03-31 Milestone: Prototype HOMBPM-electronics
Further tests of HOMBPMs and cavity alignment measurements
2013-03-31 Milestone: Final report