Transcript Preparation work for ALBA`s Closed Orbit BPMs

3rd Libera Users Meeting – June 2009
Preparation work for ALBA’s
Closed-Orbit BPMs
3rd Libera Users Meeting – June 2009
Angel Olmos
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3rd Libera Users Meeting – June 2009
OUTLINE
•
ALBA OVERVIEW
•
LIBERAS, SINCE 2nd USERS MEETING
•
ALBA FAST ORBIT FEEDBACK

BEAM POSITION MONITORS

RF CABLES

LIBERA ELECTRONICS

FOFB NETWORK

CORRECTION CALCULATION

POWER CONVERTERS

CORRECTOR MAGNETS
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3rd Libera Users Meeting – June 2009
ALBA OVERVIEW
SLS type  Booster and SR
share the same tunnel
100MeV Thales
LINAC
7 out of 32 beamlines on
day one
1 Bending
1 Wiggler
1 SC-Wiggler
2 IV-Undulators
2 Apple II Undulators
Full energy 3GeV
Booster
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3rd Libera Users Meeting – June 2009
ALBA OVERVIEW
Schedule on August-06
Jun-08 Building finished
Nov-08 Booster commissioning
Mar-09 SR commissioning during 8 months
Oct-09 Beamlines commissioning
Schedule on April-09
?
Building not yet finished  12months delay
Jul-09 Cooling available  13 months delay
Oct-09 Booster commissioning  11 months delay
May-10 SR commissioning during 2 months  14 months delay
Sep-10 Beamlines commissioning  13 months delay
Beam for users, January 2011
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3rd Libera Users Meeting – June 2009
ALBA OVERVIEW
Where are we now?
Moving from University to
ALBA site on April-09
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3rd Libera Users Meeting – June 2009
ALBA OVERVIEW
Where are we now?
LINAC pre-commissioning done on Summer-08
Turn-key system from Thales
Temporally electricity
and cooling
LTB and LiDia CELLS
responsability
Full commissioning
TBD by fall-09
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3rd Libera Users Meeting – June 2009
ALBA OVERVIEW
Where are we now?
Service Area (electronic racks)
and Experimental Hall finished
Booster mechanical installation finished
SR  8 out of 16 sectors installed
Cooling and Air
conditioning pending
Cabling campaign
has started
Hutches and beamlines on the way
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3rd Libera Users Meeting – June 2009
OUTLINE
•
ALBA OVERVIEW
•
LIBERAS, SINCE 2nd USERS MEETING
•
ALBA FAST ORBIT FEEDBACK

BEAM POSITION MONITORS

RF CABLES

LIBERA ELECTRONICS

FOFB NETWORK

CORRECTION CALCULATION

POWER CONVERTERS

CORRECTOR MAGNETS
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3rd Libera Users Meeting – June 2009
LIBERAS, SINCE 2nd USERS MEETING
- Not much ... that’s why I’m showing you other stuff 
- Two units (not really used) during LINAC pre-commissioning (release 1.8)
Peak detector on Device Server
for position calculation
LINAC synchronization
problem
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3rd Libera Users Meeting – June 2009
LIBERAS, SINCE 2nd USERS MEETING
- Development of a generic Matlab GUI for 2.0
Used for Lab testing of
new SW releases
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3rd Libera Users Meeting – June 2009
OUTLINE
•
ALBA OVERVIEW
•
LIBERAS, SINCE 2nd USERS MEETING
•
ALBA FAST ORBIT FEEDBACK

BEAM POSITION MONITORS

RF CABLES

LIBERA ELECTRONICS

FOFB NETWORK

CORRECTION CALCULATION

POWER CONVERTERS

CORRECTOR MAGNETS
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3rd Libera Users Meeting – June 2009
ALBA FAST ORBIT FEEDBACK
Beam Position Monitors
BPM readout
electronics
FOFB
network
Correctors Power Converters (PC)
Correction CPUs
Correctors magnets
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3rd Libera Users Meeting – June 2009
ALBA FAST ORBIT FEEDBACK
Beam Position Monitors
BPM readout
electronics
FOFB
network
Correctors Power Converters (PC)
Correction CPUs
Correctors magnets
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3rd Libera Users Meeting – June 2009
BEAM POSITION MONITORS
Beam Position Monitor block  On chamber welded block including 4 buttontype feedthroughs
Feedthroughs and BPM blocks tested during
different stages at factory and at site
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3rd Libera Users Meeting – June 2009
BEAM POSITION MONITORS
Buttons measurements at factory (FMB)
TDR head for reflection measurement
1- After manufacturing
+ Check manufacturing process
+ Calculate electrical behavior
+ Sort the buttons before welding
2- After welding on the BPM block
+ Prove that buttons are OK
3- After baking of the chambers
+ Final OK before delivery
Capacitance Dispersion < 1%
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3rd Libera Users Meeting – June 2009
BEAM POSITION MONITORS
BPMs Electrical Offset measurement at site
- Offset due to non perfect buttons and their placement in the block holes
- Measured by external means. No wired method possible
S-paremeters measurement using a 4-ports network analyzer
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3rd Libera Users Meeting – June 2009
BEAM POSITION MONITORS
BPMs Electrical Offset measurement at site
Processing
of Tx coefficients
H/V
offsets
Booster case
Max offset kept below 150 µm
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3rd Libera Users Meeting – June 2009
ALBA FAST ORBIT FEEDBACK
Beam Position Monitors
BPM readout
electronics
FOFB
network
Correctors Power Converters (PC)
Correction CPUs
Correctors magnets
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3rd Libera Users Meeting – June 2009
RF CABLES
- First stage of semi-rigid PEEK dielectric cables being installed (as Soleil case)
Tight space between magnets
makes impossible to plug any
cable without a pre-stage
After chamber bakeout
Chamber movement on top of half-opened magnets
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3rd Libera Users Meeting – June 2009
RF CABLES
- RF cables from the semi-rigids to the Liberas are on the way of production
- 4 Andrew CNT-240 cables in a hosepipe (Copy+Paste cheap version of the
commonly used Time Microwave LMR-240)
- 5000m of cable ordered. Assembly of SMA
connector to be done by cabling company
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3rd Libera Users Meeting – June 2009
LIBERA ELECTRONICS
- As said, not much has happened
- Last tested software release was 1.82 (the one on the installed units)
- Release 2.0 installed on 3 units but not yet tested
- Matlab GUI for 2.0 developed but not really used
- About TANGO device server ... still “forking” on others job
- Small pseudo-server developed for LINAC beam peaks analysis
- HW installation of 120 Storage Ring units on the Service Area done
- Only 12 of the 28 Booster units installed. The others kept for Lab testing
- Report of failures/interventions:
+ Hardware patch (30). Ethernet cable length...
+ Wrong voltages (8) ... not used on Libera
Corrected
Not corrected
+ Out of specs on BCM (2)
+ Noisy channel (1)
+ Out of specs on TbT rms, low # ADCs (2)
+ PM buffer not triggered (1)
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3rd Libera Users Meeting – June 2009
ALBA FAST ORBIT FEEDBACK
Beam Position Monitors
BPM readout
electronics
FOFB
network
Correctors Power Converters (PC)
Correction CPUs
Correctors magnets
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3rd Libera Users Meeting – June 2009
FOFB NETWORK
Distributed architecture using 4 racks per sector (NT, Diagnostics, Controls, PCs)
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3rd Libera Users Meeting – June 2009
FOFB NETWORK
Topology based on the use of network spare optical fibers to Sector 09
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3rd Libera Users Meeting – June 2009
Patch panel on Sector 09 will allow
any combination of interconnections
FOFB NETWORK
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3rd Libera Users Meeting – June 2009
ALBA FAST ORBIT FEEDBACK
Beam Position Monitors
BPM readout
electronics
FOFB
network
Correctors Power Converters (PC)
Correction CPUs
Correctors magnets
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3rd Libera Users Meeting – June 2009
CORRECTION CALCULATION
- Distribution of data using Diamond Communication Controller internally
agreed few weeks ago (discussions since who knows when)
- We will pay ITech for the integration job in our design
- Original plan was to use MicroResearch reading board + distributed
processing CPUs
- Pentium M running Linux 2.6 already installed but “under investigation”
- Not possibility of DMA on MicroResearch boards turns us to look for other
solutions  VMETRO? ... Tell me!!!!
- Correction done with widely used SVD algorithm + PID controller
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3rd Libera Users Meeting – June 2009
CORRECTION CALCULATION
- Even though we have 120 BPMs and their corresponding Libera electronics, only position
data from 88 BPMs will be used for orbit correction  Why?
- Representation of β functions vs. phase advance shows that some BPMs give almost the
same information (same info = no info)
- BPMs are better distributed according the vertical plane  were more precision is needed
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3rd Libera Users Meeting – June 2009
ALBA FAST ORBIT FEEDBACK
Beam Position Monitors
BPM readout
electronics
FOFB
network
Correctors Power Converters (PC)
Correction CPUs
Correctors magnets
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3rd Libera Users Meeting – June 2009
Power
converter
POWER CONVERTERS
Diamond
I/V
transducer
ADC
RS232
service port
PSI
Controller
Correctos PCs rack
ALBA Controls rack
Optical
Correction
Calculation
CPU
Tx
Electrical  Optical
Board
IP
modules
Carrier
Optical protocol
management
• Provide ±1mrad of DC
deflection and ±40µrad
@ 100Hz
• Resolution of 18 bits
• OCEM-Diamond PCs
Tested at factory but
not yet delivered
Commercial
cPCI Bus
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3rd Libera Users Meeting – June 2009
CORRECTOR MAGNETS
Horizontal Steering
Vertical Steering
- ALBA sextupoles have extra coils to provide
H/V beam steering
- All delivered and on installation process
- Eddy currents on the vacuum chamber
reduce the effect of the magnetic field at
high frequencies
- Chamber thickness reduction to 2mm in the
correctors
FOFB limiting factor
fH=235 Hz
fV=1550 Hz
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3rd Libera Users Meeting – June 2009
WHAT’S NEXT?
- LTB, BTS and BOOSTER BPMs electrical offset measured
- Half of the Storage Ring BPMs still pending. Measurement goes together with installation
- On site measurement of RF cables lengths (by cabling company)  connec. assembly
- All RF cables will be checked after installation one by one
- Test Libera release version 2.03 in the Lab (probably our production version)
- Develop graphical utilities for Booster and Storage commissionings
- Take decisions about “sniffer” boards and processing CPUs
- Receive and test the correctors power converters
- Implement an small FOFB in the lab before final installation
LINAC full commissioning by Sep-Oct 09
Booster commissioning right after LINAC
Storage Ring commissioning May-10
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3rd Libera Users Meeting – June 2009
Preparation work for ALBA’s
Closed-Orbit BPMs
3rd Libera Users Meeting – June 2009
Angel Olmos
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