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Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.
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Transcript of Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.
![Page 1: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/1.jpg)
Bruno Muratori (for the EMMA team)
STFC, Daresbury Laboratory
EMMA commissioning
02/09/08
![Page 2: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/2.jpg)
Overview
• What is commissioning ?– Preparing machine for beam
• set-up DAQ & controls & hardware• set-up diagnostic devices required
– Getting beam into the machine & where you want it– Making sure all desired properties are achieved
• for the bunch (full characterisation etc.)• for the machine (e.g. dispersion-free sections)
– Set-up machine for particular experiments– Need as many simulations of the machine as possible !
![Page 3: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/3.jpg)
I. Gun commissioning - complete (December 2007)
II. First energy recovery- will start now (September 2008) !- all procedures are ready (in Wiki)- online modelling (Mathematica based), being
currently developed- get the energy recovery without FEL first
III. Machine tuning - fine beam tuning - phase space manipulation to achieve minimal bunch
length - full beam characterisation - EO bunch length measurements
ALICE commissioning (1)
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IV. Energy recovery with FEL- first light from FEL- energy recovery of FEL disrupted beam - commissioning complete
V. ALICE exploitation - CBS experiments- tomography with space charge (in EMMA injection line)- other experiments (e.g. linac transfer matrices measurement)- preparations for EMMA commissioning
ALICE commissioning (2)
![Page 5: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/5.jpg)
ALICE schematic
LINAC
BOO
STER
GU
N
SOL-01
H&V-01
H&V-06BPM-01
BUNCHERYAG-01
SOL-02
H&V-02 BPM-02
Q-01
YAG-02 Q-02
BPM-03
H&V-03 Q-03
Q-04
YAG-03
DIP-01
Q-05
DIP-02
YAG-??
FCUP-01
BPM-04H&V-04
Q-06Q-07
Q-08Q-09
DIP-3
Q-10
YAG-04
Q-11 BPM-05H&V-05
Q-12
INJECTOR
OTR-01BPM-01H&V-01
ST1
OTR-02 DIP-01DIP-02
DIP-03Q-01
OTR-03
BPM-02H&V-02
Q-02 Q-03 Q-04
OTR-04
BPM-01DIP-01
BPM-02SEXT-01
OTR-01
ST1 ARC1
ARC1
Q-01
V-01
Q-02
BPM-03
DIP-02
BPM-04
Q-03
V-02
Q-04
OTR-02SEXT-02
BPM-05DIP-03
BPM-06
OTR-01
Q-01Q-02
BPM-01H&V-01
OTR-02
Q-03Q-04
BPM-02H&V-02DIP-01
DIP-02BPM-03V-03
OTR-03
DIP-03
DIP-04Q-05
ST 2ST 2
ARC 2 PLM-01TCM-01
BPM-04H&V-04
BPM-05H&V-05
BPM-01H&V-01
Q-06Q-07
WIGGLER
ST 3ST 3
Q-01Q-02
Q-03Q-04
OTR-01
BPM-02H&V-02
BPM-01DIP-01
BPM-02SEXT-01
OTR-01
Q-01
V-01
Q-02
BPM-03DIP-02
BPM-03Q-03
V-02
Q-04
OTR-02SEXT-02BPM-05
DIP-03BPM-06
ARC 2
ST4
OTR-01Q-01 Q-02
BPM-01H&V-01
Q-03
DUMP-01
Q-04 Q-05
BPM-02H&V-02
OTR-02DIP-01 DIP-02 DIP-03
BPM-01Q-01
Q-02Q-03
OTR-01
DMP
1 m
Note: scale is for guidance only
ERLP SCHEMATIC DIAGRAM
v.0.2 (15/06/2006)extracted from AO-180/10078/E
• Need similar schematic for EMMA injection line, ring and extraction line (shall be enormously more detailed … !)
![Page 6: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/6.jpg)
Injection Line Commissioning (1)
• I Prepare ALICE as Injector for EMMA– Set required beam energy (e.g. 10 MeV)– Beam characterisation
• Bunch length / Charge / Emittance / Energy spread / other ?
– Hardware commissioning– Controls & online model commissioning
• These should be as comprehensive as possible (within reason)
– DAS commissioning
![Page 7: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/7.jpg)
Injection Line Commissioning (2)
Set initial charge at 1 pC• II Thread beam through injector line
– Cancel dispersion in diagnostic straight– Steering: use steerers & kickers to get beam to given
point & with right angle depending on energy and required septum settings
– Beam characterisation (as much as possible – as always !)
– Comparison with models wherever possible
![Page 8: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/8.jpg)
Injection Line Commissioning (3)
• III EMMA ½ turn → extraction– Threading beam without acceleration– Threading beam with acceleration– Characterisation of beam in both cases (extraction /
diagnostic line)• IV EMMA 1 ½ turn → extraction
– Threading beam without acceleration– Threading beam with acceleration– Characterisation of beam in both cases (extraction /
diagnostic line)
![Page 9: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/9.jpg)
Injection Line Commissioning (4)
• V EMMA 10 turn → extraction– Same as before but
• In one go ?• Step by step ? (i.e. one turn at a time)
– Characterisation of beam in all cases
Set nominal charge (q = 16 or 32 pC)• VI Repeat all of the above• VII EMMA exploitation
– Establish Orbit– Tune measurements– Aperture survey
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ALICE
EMMA
ALICE quadrupoles
SRS quadrupoles
New quadrupoles
Faraday Cup
Screen
last dispersivesection
Diagnostics:injection line
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Diagnostics – injection line (1)
• OTR Screen in ALICE before extraction dipole• BPMs @ entrance of every dipole in injection line• Straight ahead Faraday cup to measure charge &
energy spread• OTR screen in dogleg for bunch length & energy
measurement• Tomography section: 60 degrees phase advance per
screen with three screens for projected transverse emittance measurements
![Page 12: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/12.jpg)
Diagnostics – injection line (2)
• Last dispersive section:– OTR screen & vertical slit in middle of first section
together with– OTR screen in final section for energy and energy
spread measurements– Vertical steerers for position & angle before ring (to
be used with kickers for steering)– BPM at entrance of EMMA ring for position before
entering
![Page 13: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/13.jpg)
Online Modelling (1)
• Build on ALICE experience– Gun commissioning
• Script to run ASTRA for comparisons / predictions– Injection line
• Run GPT for space charge calculations in ALICE• Script to run ELEGANT / other for remainder of
ALICE– ALICE ring
• Script to run ELEGANT / GENESIS / other codes for lasing etc.
![Page 14: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/14.jpg)
Online Modelling (2)
• Create model of ALICE to EMMA injector line in GPT– Run this model both on & off line for comparisons /
predictions• Create S2E model for all of EMMA in GPT
– Run with field maps & misalignments for comparisons / predictions
– Run all the way to spectrometer & dump in the EMMA extraction line
• Compare this with ZGOUBI models & FFEMMAG models wherever possible
![Page 15: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/15.jpg)
Online Modelling (3)• Ring optics – what things may look like
courtesy S. Machida
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Online Modelling (4)• Injection orbit and optics - what things may look like
Set septum and kicker strength
See orbit and optics of incoming beam
courtesy S. Machida
![Page 17: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/17.jpg)
Injection Septum 65°
Kicker
Kicker
Cavities x 19
Extraction Septum 70°
Kicker
Kicker
Screen
Wire Scanner
Wall Current Monitor
Wire Scanner
Screen
BPM x 82
D Quadrupole x 42F Quadrupole x 42
16 Vertical Correctors
IOT Racks (3)
Waveguide distribution
EMMA Ring
KickerPowerSupplies
SeptumPowerSupply
SeptumPowerSupply
KickerPowerSupplies
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Establishing the orbit (1)• Look at Beam Position Monitor (BPM) one by one from the
injection point (not symmetric → not straightforward)• Adjust initial beam position (x,x’,y,y’) as well as Quad
current and position
BPM
![Page 19: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/19.jpg)
Establishing the orbit (2)
• Double focusing lattice (QF and QD)• Bend fields are created by shifting quadrupoles
QFQD
Linear slide
• 4 knobs– QF and QD strength– QF and QD position
(horizontally)
• 4 parameters to fit
– Qx and Qy
– TOF shape and offset
![Page 20: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/20.jpg)
ERLP
EMMA
SRS quadrupoles
New quadrupoles
TD Cavity
spectrometer dipoleDiagnostics:
extraction line
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Diagnostic linedeflecting cavity tomography EO
spectrometer
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NEW DIAGNOSTICS BEAMLINE LAYOUTSpectrometer BPM @ dipole entranceScreenFaraday Cup
E-O Monitor
Screen x 3Tomography Section
Wall Current Monitor
BPM & Valve
SRS Quadrupoles x 6
New Quadrupoles x 4
ALICE
New Dipoles (43°) & BPMs at dipole entrance
Current measurement Longitudinal profile
Position measurement
New Quadrupoles x 4
Screen& Vert. Slit
Emittance measurement
Extracted momentum
Location for Transverse Deflecting Cavity(NOT IN BUDGET)
Screen
![Page 23: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/23.jpg)
Measurements in diagnostic line
• Energy– First dipole & spectrometer at end with OTRs
• Emittance– Quadrupole scans & tomography 60° phase
advance / screen– Equivalent set-up in injection line for comparisons
• Bunch length– EO monitor downstream of tomography– No profile information
![Page 24: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/24.jpg)
Measurements with TDC
• Slice emittance & transverse profiles given by
– knowledge of R12 from TDC to screen
– horizontal dimension on screen gives slice emittance– vertical dimension gives bunch length
• Slice energy spread given by– streaked beam and spectrometer
12 sind sR 01 11 12''01 21 22
xx R R
xx R R
![Page 25: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/25.jpg)
Experiments on EMMA
• Cross different large resonances• Measurement of time of flight
– Change frequency until no synchrotron oscillations– Frequency then translates into TOF– Hence find minimum of TOF
• Relationship of TOF to lattice parameters / tune– Tune vs. energy
• Study variation of all parameters to lattice properties• Interpretation of BPM readings
– Not all identical & only symmetry every other cell– Important to model all BPM readings → GPT / other
![Page 26: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/26.jpg)
Aperture survey
• Phase space at injection• Scan aperture in phase space with a pencil beam• See S. Tzenov’s talk for more details
• When is normalized acceptance is 3 mm rad ?• Explore acceptance at all energies• Should also be modelled with FFEMMAG, GPT & others• To be done at all energies from 10 to 20 MeV
x’
/
x
/
pencil beam
![Page 27: Bruno Muratori (for the EMMA team) STFC, Daresbury Laboratory EMMA commissioning 02/09/08.](https://reader036.fdocuments.us/reader036/viewer/2022081603/5697bfc51a28abf838ca6e64/html5/thumbnails/27.jpg)
Conclusions / Discussion
• Commissioning for EMMA will be a lengthy procedure !• As many models as possible are required for all aspects
of the machine– At all energies– For all lattices
• These may be far from
perfect but should give
insight into the trend or
pattern of beam behaviour e.g. ALICE solenoid scan• Online models should also be done where possible &
necessary
0
5
10
15
20
300 320 340 360 380 400
SQRT (XY)FWHM (Astra)
SQ
RT
(X
Y),
mm
B1, G
SOL-01 scanBeam size (FWHM) on YAG "A"Q = 54pC (#712)