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