Philip Burrows

1
FONT Planning Issues

• Philip Burrows
• John Adams Institute
• Oxford University
• LCABD 2007-10
• ATF / ATF2
• ESA
• Miscellaneous

2
LC-ABD1 Structure
PPARC OSC
Advisory Comm.
G. Blair (Principal Investigator) P. Burrows
(Project Manager)
WP2 G. Blair
WP1 D. Angal Kalinin
WP3 A. Reichold
WP4 P. Burrows
WP5 M. Poole
Task 1.1 D. Angal Kalinin
Task 5.1 J. Clarke
Task 4.1 P. Burrows
Task 2.1 G. Blair
Task 3.1 A. Reichold
Task 5.2 A. Dexter
Task 4.2 S. Boogert
Task 1.2 J.Jones/G.White
Task 2.2 G.Doucas/A.Gillespie
Task 5.3 N. Watson
Task 2.3 I.Bailey
Task 5.4 R.Appleby, C.Densham
3
LC-ABD2 Structure
GDE
Principal Investigator Blair Project Manager
Burrows Project Coordinator TBD Industry
Liaison TBD
PPARC OSC
Advisory Comm.
WP1 Clarke
WP2 Wolski
WP3 Jones
WP4 Angal Kalinin
WP5 McIntosh
WP6 Reichold
WP7 Burrows
WP8 Blair
WP9 Boogert
WP10 Densham
Tasks
Tasks
Tasks
Tasks
Tasks
Tasks
Tasks
Tasks
4
FONT new resources 2007-10
  7. Beam FB
New Staff (inc ind. est.) 1066
Equipment 80
Consumables 191
Travel 236
Total New 1573
5
People

• Oxford Daresbury
• Philip Burrows
• Glenn Christian
• Hamid Dabiri Khah
• Tony Hartin
• Alexander Kalinin
• Javier Resta Lopez
• Colin Perry
• Graduate students
• Christine Clarke (3)
• Christina Swinson (2)
• Ben Constance (1)
• Robert Apsimon (0)

6
WP7 Main Goals
1) Prototype ILC intra-train beam feedback
system contribute engineered design to EDR
2) Study of EM backgrounds and optimisation of
IP FB system design against them 3) Design
simulation of integrated global alignment, FB
luminosity tuning strategy for EDR
7
WP7 Main Goals
1) Prototype ILC intra-train beam feedback
system contribute engineered design to EDR
VERY HIGH 2) Study of EM backgrounds and
optimisation of IP FB system design against
them HIGH/MODERATE 3) Design simulation of
integrated global alignment, FB luminosity
tuning strategy for EDR MODERATE
ESSENTIAL
8
ILC status

• RDR completed
• Next phase EDR being planned by GDE now
• - Likely to be a BDS work package dominated by
  SLAC UK
• Aim for EDR completion in 2010 hope for green
  light from (US) Govt. so project can start
• Details will be announced at LCWS Hamburg June 07
• The GDE RD board was asked by PPARC to comment
  on LCABD proposal
• GDE aims to exert tighter control on national
  RD spending
• We will not be allowed to work on things that are
  not directly ILC relevant, and agreed by GDE!

9
ATF/ATF2 schedule goals

• Until mid 2008 (?) ATF continues as now
• Late 2008? Reconfigure ATF and connect to ATF2
• Early 2009? ATF2 commissioning
• ATF2 goals
• Achieve 35nm spot at ATF2 FF (2009??)
• Stabilise spot to nm level (2010??)
• Comments
• This schedule already slipped by 1 year Yen
  tight in Japan
• Took FFTB several years to achieve 70nm spots

10
ATF/ATF2 bunch structure

• 2 or 3 bunches with 300 or 150ns spacing until
  late 2008
• Fast kicker development work will proceed in
  parallel with ATF/ATF2 completely uncorrelated
  with ATF2 goals
• IMHO the fast extraction kicker could take longer
  to develop
• By 2009?? or 2010?? might get 20-60 bunches w.
  300ns spacing

11
FONT at ATF/ATF2

• Goal 1 Micron-level beam stability needed at
  ATF2 FF entrance
• Goal 2 Sub-micron stability needed
• -gt wont get either w/o (intra-train) beam FB
  FF
• (depends on bunch-bunch jitter this is unlikely
  to be better with the fast kicker extraction from
  DR!)
• Also for goal 2 they imagine IP FB using Honda
  IPBPM w. nm resolution
• (nice, but not directly relevant for ILC FB!)

12
Default ATF/ATF2 plan

• 2007/8 get FONT4 working properly (gain,
  delay-loop )
• - operational improvements
• design upstream FONT system for ATF2
• what resolution to aim for?
• 1 micron striplines vs. sub-micron cavities?
• beamline layout
• angle also? x also?
• feed-forward?
• 2009 Commission ATF2 FONT system for goal 1/2
• 2010 20-60 bunches at 300ns? IP FB w nm BPM?
• add luminosity signal input for fast scanning?

13
Schematic ATF2 feedback layout 1
e-
x
y
x
y
Kicker
BPM
BPM
BPM
BPM
Kicker
Kicker
Kicker
14
Schematic ATF2 feedback layout 2combined x-y
kickers
e-
x
y
x
y
Kicker
BPM
BPM
BPM
BPM
Kicker
15
Schematic ATF2 feedforward layout 1
e-
x
y
x
y
Kicker
BPM
BPM
BPM
BPM
Kicker
Kicker
Kicker
y
x
y
x
Damping Ring
16
Schematic ATF2 feedforward layout 2 combined
x-y kickers
e-
x
y
x
y
Kicker
BPM
BPM
BPM
BPM
Kicker
y
x
y
x
Damping Ring
17
FONT bench test system

• Manufacture synchronised ILC bunch-train, clocks,
  and trigger
• Develop algorithms and program FPGA
• Close loop
• (Include amplifier and dummy kicker also!)

Bunch
Trigger
2.16 MHz
Diagnostic
18
End Station A

• Only guaranteed next run is July 2007
• Fighting for runs in 2008 uphill battle
• - probably get some beamtime
• - long-term ESA looks dodgy
• Longer term default to use SABER and/or LCLS
  beam -gt ESA
• Need to decide
• what to do in July 2007 run?
• any further requirements for beam for EM
  studies?

19
Beam simulations

• Apart from Tonys EM simulations these have been
  on the back-burner since Glen left
• Need to get plugged in to ILC LET studies for EDR
• - continue/improve intra-train FB simulations
• - integrate intra-train and 5Hz feedbacks
• - integrate BDS feedbacks
• - understand relationship with upstream FBs and
  FFs
• - global FB, tuning strategy, alignment

20
Miscellaneous

• FONT www site!
• needs updating generally
• meetings pages/archive
• repository for PAC/EPAC papers
• Journal publications!