review of beam instrumentation in ctf3
DESCRIPTION
Review of Beam Instrumentation in CTF3. Anne Dabrowski CERN BE/BI On behalf of all involved. Outline. Overview of Instrumentation BPMs ; Transverse Profile ; Longitudinal Profile ; Bunch Frequency Measurements Instrumentation activity in 2009 New Installations Maintenance and improvements - PowerPoint PPT PresentationTRANSCRIPT
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Review of Beam Instrumentation in CTF3
Anne DabrowskiCERN BE/BI
On behalf of all involved
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Outline• Overview of Instrumentation
BPMs ; Transverse Profile ; Longitudinal Profile ; Bunch Frequency Measurements
• Instrumentation activity in 2009
New Installations
Maintenance and improvements
Calibrations and Beam Based Measurements
• Instrumentation activity foreseen for 2010
Design
New Installations
Upgrades
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Overview of Instrumentation installed (I)
Beam Position and Intensity Monitors
2 BPE’s + 46 BPM’s + 54 BPI’s + 6 Re-Cavity BPM (califes) + 16 BPS + 5 WCM’s
Juanjo Garrigós et al .Valencia Univ.
(based on M. Gasior BPM, scaled for reduced aperture – 24 mm)16 unitsresolution ~30um
Inductive Pickup (BPS) - TBL CTF3 has final 129 position / intensity monitors!
Main activities 2009
Final BPM vacuum installations—Installation of 16 BPS with aligned support - Univ Valencia, Built and tested at IFIC. —BPS Amplifiers: Univ. Politècnica de Catalunya (UPC)
Radiation damage to LAPP digitizing acquisition for TL2 / CLEX installed in the machine Preparation of “Linac / Combiner Ring type” acquisition system and calibration software for the BPMs in TL2 / CLEX
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
CLEX
DELAY LOOPCOMBINER
RING
LINAC
Overview of Instrumentation Installed (II)
TL2
Transverse Profile monitors
14 TV stations for OTR based emittance measurements
7 TV stations for OTR based spectrometry (energy)
7 TV stations for Synchrotron light (Chicane and Rings)
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Cleaning Chicane Cleaning Chicane
Stretching Chicane Stretching Chicane
Injector, 1.5 GHz Bunch Spacing Injector, 1.5 GHz Bunch Spacing
Compression chicane - TL2Compression chicane - TL2
Combine Beam, 12 GHz Bunch Spacing Combine Beam, 12 GHz Bunch Spacing
• Linac ~ 1-7 ps
• Delay Loop and Combiner Ring > 8ps
• CLEX 1-2 ps
• Probe Beam (Califes) < 2 ps
σ= 4.5ps (1.4 mm)
σ= 8.9ps (2.7 mm)
Streak LabsDL, CR (now)CLEX (2010)
Overview of Instrumentation Installed (III)Longitudinal Bunch Profile
RF Deflecting Cavity, OTRStreak Camera Synch Light, or OTR
Bunch Length Form Factor (r.m.s.)BPR-W (Power @ 30 GHz)RF-pickup (Power 30 – 170 GHz)CDR Experiment
Bunch Combination EfficiencyBPR-S (Down-mixed 3 GHz)Phase monitor DLPhase monitor CRStreak Camera Synch Light, or OTR
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Outline• Overview of Instrumentation
BPMs ; Transverse Profile ; Longitudinal Profile ; Bunch Frequency Measurements
• Instrumentation activity in 2009
New Installations
Maintenance and improvements
Calibrations and Beam Based Measurements
• Instrumentation activity foreseen for 2010
Design
New Installations
Upgrades
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Instrumentation activity in 2009
New Installations 7 Transverse Profile Monitors
• TL2 emittance tank
• TL2’ emittance tank
• TBL emittance tank
• TBTs drive beam (Uppsala / Saclay mechanics & planning – CERN acquisition & control)
• TBTs probe beam (Uppsala / Saclay mechanics & planning – CERN acquisition & control)
• TBL final spectrometer line
• PHIN Virtual Cathode acquisition & control
PHIN- 2 Gated (5ns ; 100ns) Intensified Camera
- 4.8 degrees to the spectral reflection for OTR based profile measurements
- 20 Channel Segmented Dump for Time Resolved Profile Measurements designed, built and commissioned
Maintenance and Improvements Replacement of damaged screens Planning for “Linac / Combiner Ring type” BPM acquisition hardware TL2/CLEX BPM Calibration software development for TL2/CLEX
Activity 2009
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Streak
Camera
–
Bunch
Length
Measurement
Activity 2009 – Beam Based Measurements
• Bunch Shape– A Skew Gaussian bunch shape
• Measure calibration factors– Vary Time Streak Trigger and calculate the
corresponding position of the peak of the bunch– 0.122 ± 0.004 ps/pixel (2 sigma) for 10ps/mm
• Measurement of the jitter in peak– eg 5.5 ps ± 0.2 (2 sigma)– Contribution from trigger and beam
• Slit size contribution to measurement - FWHM in focus 14.8±0.9 pixels (2 sigma)- Corresponds to ~350 μm
Propagate all error contributions …
Typical measurement error on FWHM is 4% (2 sigma)
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010Activity 2009 – Beam Based Measurements
Bunch Length measurement along pulse train Streak Camera in Combiner Ring using MTV 0496 (zero dispersion point) 3 GHz uncombined beam, by-passing the delay loop 50 ns sampling 2 sigma error bars
Use Streak Camera measurement and this bunch length variation to cross calibrate other bunch length instruments
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
BPR with WR-28 waveguide port
•Power measurement at (30±4) GHz 3 db band poss
•For given beam current & position:
Maximise the signal Minimise bunch length
Relative Bunch Length measurement – BPRW
shape)bunch Gaussian (example2
22
22
2c
o
t
eqr
rP
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Calibration of CR.BPRW0505W with Streak Data
Activity 2009 – Beam Based Measurements
- Data used: 04-12-2010- Beam conditions: 3 GHz 4 Amp beam- Use time resolved bunch length from Streak - Assume quadratic function for fit
222
21
0
22AmV2
2AmV10ps
/mV)(A ps 0.06p
/mVA ps 2.04p
ps 23.22p
))/(BPM(BPRW*p)/(BPMBPRWppσ
BPR and Streak in good agreement
Exercise should be repeated with different beams to study systematics and verify current and position normalization
Error in calibration large (40% error 2 sigma)
Measurement of BPM, BPR and Streak relevant for a good calibration
BPR’s used as Online bunch length measurement available today!
Application of Calibration:
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Similarly Compare RF pickup (waveguide down mixing) to Streak
Power measurement in time domain
Correspond power (33 GHz) to bunch length Streak
Corresponding Frequency domain
Apply Band pass filter to isolate beam signal
Good agreement between RF pickup and Streak in the Steady state part of the pulse
Calibrated RF-pickup 33 GHz form factor
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Injector, 1.5 GHz Bunch Spacing Injector, 1.5 GHz Bunch Spacing
Bunch Combination Efficiency Measurements
odd buckets
even buckets
Delay Loop
RF deflector
Combination scheme
λo =20cm
Bunch combination efficiency
Streak Camera using Synch Light
BPR (3 GHz Beam signal mixed with ref. 3 GHz signal)
Phase monitorDL: Harmonics of 1.5 GHz and 3.0 GHzCR: Harmonics of 3 GHz [6, 9 12, 15 GHz]
CCD
Streak
Gated
Combiner Ring Multiplication
λo =10cm
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Streak Camera measurements of 18th November 2009
Bunch spacing between Delay Loop and Combiner Ring:
Measurement conditions: 50 ps/mm, blue filter in
Turn DL late by
1 12.99 ± 3.32 ps
2 25.33 ± 3.44 ps
3 32.43 ± 3.50 ps
4 16.89 ± 3.36 ps
Example
Aurélie Rabiller
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Online monitoring bunch spacing with the Phase Monitor
Activity 2009 – Beam Based Measurements
Frequencies
Delay loop: 7.5, 9.0, 10.5 & 12 GHzCombiner ring: 6.0, 9.0, 12.0 & 15 GHz
Power induced by the passing beam, picked up by 4 antennae
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Measuring the bunch spacing with Phase Monitor (CR)
Activity 2009 – Beam Based Measurements
Simulation
beam with uniform current
15 ps FWHM Gaussian Bunch length uniform along the pulse
Turn 1, shows effect of bunch length
Data compared to simulation
3 GHz uncombined beam for hardware test (04-12-2010)
Raw signal corrected for electronic gains
Simulation includes the bunch length dependence along the pulse measured with the BPRW & current variation using BPM
Data compared to simulation, shows strong correlation
Data 3 GHz
Simulation 3 GHz + bunch length (t) + current (t)
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Monitor bunch spacing with the Phase Monitor
Activity 2009 – Beam Based Measurements
Example of measurement 18 Nov 2009, Factor x8 combination current
DL ~ 20 ps late Bunch length variation along the pulse
train
Measurement difficult to interpret because of bunch length and bunch spacing variations
The way forward?
Instrumentation:
Use BPRW in CT line to measure bunch length along pulse train & normalize
Produce feedback for the operators
Re-design phase monitor to work at lower frequencies – less sensitive to bunch length variations ?? (see extra slides for potential upgrade Steve Smith)
Raw data CR
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Spectrometery
Design
work
2009
• Extensive Fluka and GEANT4 studies on 5-150 MeV electrons interacting with matter
• Necessary for optimizing detector resolution, thermal effects, material choices and radiation damage for time resolved spectrometry
• Transverse and longitudinal shower energy deposition
Excellent FLUKA /
GEANT4 agreement
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Segmented
dump for
PHIN commissioned
• Good correlation with Energy measured in the dump and RF
• CTF3 note 099
• Tuning of the RF beam loading with segmented dump to get a uniform steady state beam pulse
Beam loading compensation
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Outline• Overview of Instrumentation
BPMs ; Transverse Profile ; Longitudinal Profile ; Bunch Frequency Measurements
• Instrumentation activity in 2009
New Installations
Maintenance and improvements
Calibrations and Beam Based Measurements
• Instrumentation activity foreseen for 2010
Design
New Installations
Upgrades
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Bunch
Length
Measurement in
CLEX -
2010
- Bunch Length Measurement in CLEX
Activity 2009-2010
Cleaning Chicane Cleaning Chicane
Stretching Chicane Stretching Chicane
Injector, 1.5 GHz Bunch Spacing Injector, 1.5 GHz Bunch Spacing
Acceleration 3.0 GHz Acceleration 3.0 GHz
Compression chicane - TL2Compression chicane - TL2
Combine Beam, 12 GHz Bunch Spacing Combine Beam, 12 GHz Bunch Spacing
Streak LabsDL, CR (now)CLEX (2010)
Design & Installation foreseen (2010)
Long Optical lines and New Streak Lab for Streak Camera measurement in CLEX FESCA200 Streak Camera (300 fs resolution) arrive in July 2010 2 Streak Cameras aid beam studies in two machine locations at the same time
Non-destructive high frequency RF based bunch length monitoring measurement Waveguides and diode components ordered (CTF3 & NWU) Assembly & commissioning for 2010
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Ti
me resolved
energy
measurement
TBL
Activity 2009-2010
ΔE ~10-60%
High intensity (28 A) e⁻ beam of 150 MeV
High energy transient
Nominal pulse length: 140 ns
New detector design
•Design:32 channel transverse faraday cup10° spectrometer line includes full FLUKA simulation realistic beam profile from PLACET3 mm segments, 400 μm slits collimatorSingle shot measurement of the steady state
•Implement in Machine TBL Fall 2010
5% measurement on energy spread
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
New
BPM
BI
Calibration
Software for
TL2 and
CLEX
• Java user interface in development to perform the calibration for BPMs in TL2 and CLEX• Software:
– Communicate to calibration controller crate– Calibration of all BPMs for 2 different gain ranges and attenuation ON/OFF settings– Save calibration coefficients to an archive file
• Operators can load those calibration coefficients into database for use with the XenericSampler applications
• Dedicated beam time for June startup needed for BPM calibration– Machine should be a “nominal” setting, with only the start beam trigger disabled, for calibration
132 devices with raw data: 44 pickups, 3 devices per each pickup: H/V plane + sigma
132 devices with raw data: 44 pickups, 3 devices per each pickup: H/V plane + sigma
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
BPM TL2/CLEX Calibration expert GUI
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
BLM general layout
400 x 400 SPAD array
Active surface 1mm2
Recovery time ca. 4 ns
1 photon detection
CMOS technology
Low cost detector
Quantum efficiency 20% in blue range
Immunity to external magnetic fields
Beam Loss Monitor for TBL: a general layout
Cerenkov cone
α
β
electronFiber core
Cerenkov photon
Physical principle
Silicon Photomultiplier
Angela Intermite
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Beam Loss Monitor for TBL: SiPM Dark Noise Characterization
Goal: Identification of best sensor for detection of Cerenkov Light generated by particle losses.
Investigation into:• Dark noise• Optical cross talk• Dynamic range of noise
As a function of:• Overvoltage• Temperature• Number of pixels• Pixel arrangement• Optical trench between pixels
Installation at CTF3 in 2010.
Dark count rate for different samples
1 pixel fired
2 pixels fired
3 pixels fired
Dark count rate as a function of the overvoltage
1 MHz/mm2 @ 32V
Angela Intermite
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Conclusion
Activity 2010
• A lot of BI activity in 2009• All Vacuum installation for BPMs complete• All MTVs for transverse profile measurements installed• Full diagnostics spectrometer line for PHIN has been designed, installed commissioned• Robust Bunch Length Measurement with Streak Camera• Calibration of non-destructive RF bunch length measurements using Streak Results
– BPR 30 GHz waveguide port– RF pickup
• Measuring of the bunch spacing with the Steak and Phase monitor well mature– Systematic corrections due to bunch length variation & long bunches add additional complications to
phase monitor measurement– Proposal to use 1.5 GHz down mixing technique (See extra slides Steve Smith)
• New BPM calibration software for different gain / attenuation settings – for 2010• “Linac /CR type” BPM electronics for CLEX will be ready for 2010 run• Design for time resolved spectrometry for TBL mature – ready for manufacturing• Design of bunch length measurement for CLEX has started
– Long Optical lines to New Streak Camera Lab with new FESCA 200 Streak Camera– Non destructive RF based bunch length measurement techniques
• Bunch spacing measurement for PHIN (phase coding)– BI will give support where possible (manpower/BI priorities)
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010Activity 2010
Thank you for all you contributions & to the operators for the beams!
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
EXTRA SLIDES
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Position Monitors – CTF3 & R&D CLIC
C. Simon, CEA Saclay6 units
Reentrant Cavity BPM - Califes
Inductive Pickup - EuroTev BPM
Lars Soby et al. @ CERN 3 units
Juanjo Garrigós et al .Valencia Univ.
(based on M. Gasior BPM, scaled for reduced aperture – 24 mm)16 units
Inductive Pickup (BPS) - TBL
CTF3 Sept. 2009, Operation2 BPE’s + 54 BPI’s + 46 BPM’s + 6 Re-Cavity BPM + 16 BPS + 5 WCM’s
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Procedure
Extracting the
Bunch Length
Activity 2009 – Beam Based Measurements
Single bunch profile – Skew Gaussian
Extract FWHM from measured parameters
Error of FWHM (in pixels) given by:
Calibrate and subtract quadratically contributions from jitter and PSF
Peak = µ
where:
)()()( 222
px
pscalpxPSFJitterBLpsBL FWHMFWHM
Propagate all error contributions … Typical measurement error on FWHM is 4% (2 sigma)
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
BPM
TL /
CLEX
Acquisition system
Activity 2010
Lars Soby
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
New
BPM
Calibration
Software for
TL2
and
CLEX
Activity 2010
• New BPM acquisition Software with Java user interface in development• Compliments the exisiting sampler software used by CTF3 OP• Software will
– Communicate to calibration controller crate– Calibration of all BPMs for 2 different gain ranges and attenuation ON/OFF settings– Save calibration coefficients to a database log
Setup a gain and attenuator. 2 devices, one per rack. FECs:• cfv-2010-actfrfmt• cfv-2010-bpmtl2tbts
Setup a gain and attenuator. 2 devices, one per rack. FECs:• cfv-2010-actfrfmt• cfv-2010-bpmtl2tbts
According to the given settings, uploading operational calibration coefficients to 396 devices linked to pickups and to 6 devices of a WCM
According to the given settings, uploading operational calibration coefficients to 396 devices linked to pickups and to 6 devices of a WCM
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Measurement
of the
Phase
Coding in
PHIN
Activity 2010
• Phase coding for the PHIN laser will be implemented & tested late 2010/2011• Phase coding of the Laser verified with the Streak Camera
– BI/PM will provide support (depending on other priorities)– Design optical line with only a small fraction of laser photons
• Measurement phase switch on the electron beam to be designed– Proposal
• Generate Cherenkov photons with a sapphire Chrystal• Hardware exists from CTF2 –compatibility with PHIN beam parameters (beam size,
bunch charge) to be checked• Build an optical line to transport photons from PHIN to the laser room• Image these photons with the Streak Camera
– BI/PM will provide support (depending on other priorities)
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Proposal for phase
monitor for the
DL based on 1.5
GHz signal (S.
Smith)
Activity 2010
• To remove the bunch length dependency from phase measurement propose a phase measurement based on a lower frequency
• For DL Loop 1.5 GHz rate in 3.0 GHz rate out• Ideal output is periodic at 3.0 GHz• Path length error yields signal periodic at 1.5 GHz
– gives rise to 1.5 GHz component in signal– So does slow intensity modulation in input beam
• For the DL, S. Smith proposes to use a reference 1.5 GHz signal, and to downmix it with the beam signal hence measuring directly any residual 1.5 GHz beam component that indicate a poor combination after the Delay Loop
• Simulations show sensitivity to < 1ps shown in his simulations• Much of the BPR-S pickup and electronics can be reused, only e need an (unlocked) RF source
for the 1.425 MHz LO signal needed and 1.5 GHz mixer– Block Schema – see extra slides
• For measuring the bunch combination efficiency in the combiner ring, no simple schema available
– Needs more work to find a bunch length independent schema
Steve Smith
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Simulation of 1.5 GHz down-mixing phase monitor
• Simulate ±1ps delay loop timing error. – Modulated at 25 MHz to make it stand out
in the simulation, • Add ±10% charge variation in alternating (3
GHz) buckets. – modulated at 10 MHz (for visibility) – expect errors quasi-static in real machine
• The simulated LO is phased to make the timing error show up as (almost) purely real.
• find a scale of 10 mV/ps timing error. • demodulate the 1.5 GHz to:
– real component (timing error) – imaginary component (amplitude mis-
match)• The amplitude of the 1.5 GHz signal is
completely dominated by the amplitude mis-match signal
– one can still cleanly extract the timing error signal.
– The timing error signal contaminated ~0.5ps level by the charge variation
Steve Smith
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Systematic: 1.5 GHz phase monitor
• Resolution is not limited by the signal strength– but by systematic like charge variation present on drive beam.
• Expect that to get the timing correct to 1 degree of 3 GHz (1ps) one needs the current the same to 1% over the delay of the delay loop
• However at 1.5 GHz this signal is in quadrature to the timing error signal– can in principle be separated.
• The charge difference signal is in phase with the 1.5 GHz bunches, where the time error signal is 90 degrees out of phase,– that is it comes from the alternating short and long gaps between bunches
and is phased with the center of the short gap. • Guess: reduces sensitivity to charge variation by x100• Could probably tolerate 10% charge variation over the train and still measure
delay loop timing errors of <1 ps.
Steve Smith
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Path-Lenth Diagnostics Conclusion
• Looks straightforward to measure timing to <1ps. Most of the hardware already exists.
• We need a mixer, a couple of filters and possibly an amplifier or two and probably a couple of pads.
• We need an (unlocked) RF source for the 1.425 MHz LO. • And software!
Steve Smith
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Extension of same principle to RF-pickup
Activity 2009 – Beam Based Measurements
Measurement principle:1. Measure the amplitude of the beam harmonic (30-172 GHz) of interest2. The correlation between amplitude and bunch length depends on the bunch
shape3. Normalize the power to changes in the charge and the position squared in the
cavity
shape)bunch Gaussian (example2
22
22
2c
o
t
eqr
rP
Example for Talk:1. 33 GHz beam harmonic (since bunches rather long during calibration)2. ADC is 2 GS/s, typically use 4000 points, 2 micro second time window,
delta t = 0.5 ns (X10 faster than BPRW sampling)3. LO can be chosen to have an IF that gives the best sampling of the bunch
length variation along the pulse
Beam acceleration
Beam harmonic #
Beam harmonic
Fixed first Mixing
Variable Mixing
IF IF (measured)
2.99855 GHz 11 32.984 GHz 26.5 GHz 7.2 GHz 716 MHz 735 MHz
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Implement band-pass filtering in the time domain
Power measurement in time domain
|power| [au]
Corresponding Frequency domain
Apply Band pass filter to isolate beam signal
Calibrate the Streak form factor vs. RF pickup power measurement
Use linear function
pfg(x) = a*x+b
a = 0.04571 (0.03752, 0.05389)b = 0.1536 (0.104, 0.2032)
Good agreement between RF pickup and Streak
Calibrated RF-pickup 33 GHz form factor
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Energy gain and Bunch LengtheningDue to the pulse compression system, phase sag along the Klystron pulse ~ 5-15° (see talk of A. Dubrovskiy)
not all bunches see same RF phase Difference energy gain of one bunch with respect to another Within a single bunch, the head and tail of bunches to have different energy
Example of RF amplitude and phase for MKS03
Blue 30 GHz power signal before injector chicaneGreen 30 GHz power signal after injector chicane
Bunch length variation along the pulse train is a feature in CTF3 (to a greater / lesser extent depending on RF)
Time resolved bunch length diagnostics essential
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
OTR screens for
PHIN spectrometer
opti
mised
• Surface current on Aluminized mylar screen imaged
• CTF3 note 099 Replaced by Al foil works well
PHIN camera at 4.8 deg to vertical for optimal light acceptance
Maylar screen
Al screen works better
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Ti
me resolved
energy
measurement
TBL
Activity 2009-2010
First measurement at TBL (November 2009)
Installed single slit segmented dump (2009)
Slit dump already used to understand TBL slit 1mm wide Length 100 mm iron
Review of beam instrumentation in CTF3 A. Dabrowski, 06/05/2010
Instrumentation activity in 2009 New Installations
7 Transverse Profile Monitors• CC.MTV0532 – TL2 emittance tank• CC.MTV0970 - TL2’ emittance tank• CB.MTV1070 – TBL emittance tank• CBS.MTV0100 – TBL spectrometer line• CM.MTV0590 – TBTs drive beam side (Uppsala / Saclay mechanics & planning – CERN
acquisition & control)• CA.MTV0790 – TBTs probe beam side (Uppsala / Saclay mechanics & planning –
CERN acquisition & control)• CF.MTV0100 – PHIN Virtual Cathode
PHIN- 2 Gated (5ns ; 100ns) Intensified Camera- 4.8 degrees to the spectral reflection for OTR based profile measurements- 20 Channel Segmented Dump for Time Resolved Profile Measurements designed, built
and commissioned
Maintenance and Improvements Replacement of damaged screens Planning for an Linac / Combiner ring type BPM acquisition hardware &
calibration software for CLEX
Activity 2009