Preparation work for ALBAs ClosedOrbit BPMs

1
Preparation work for ALBAs Closed-Orbit BPMs

• 3rd Libera Users Meeting June 2009
• Angel Olmos

2
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

3
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
4
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
5
ALBA OVERVIEW
Where are we now?
Moving from University to ALBA site on April-09
6
ALBA OVERVIEW
Where are we now?
Temporally electricity and cooling
LINAC pre-commissioning done on Summer-08
LTB and LiDia CELLS responsability
Turn-key system from Thales
Full commissioning TBD by fall-09
7
ALBA OVERVIEW
Where are we now?
Cooling and Air conditioning pending
Service Area (electronic racks) and Experimental
Hall finished
Cabling campaign has started
Booster mechanical installation finished
SR ? 8 out of 16 sectors installed
Hutches and beamlines on the way
8
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

9
LIBERAS, SINCE 2nd USERS MEETING
- Not much ... thats why Im 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
10
LIBERAS, SINCE 2nd USERS MEETING
- Development of a generic Matlab GUI for 2.0
Used for Lab testing of new SW releases
11
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

12
ALBA FAST ORBIT FEEDBACK
FOFB network
BPM readout electronics
Beam Position Monitors
Correctors Power Converters (PC)
Correctors magnets
Correction CPUs
13
ALBA FAST ORBIT FEEDBACK
FOFB network
BPM readout electronics
Beam Position Monitors
Correctors Power Converters (PC)
Correctors magnets
Correction CPUs
14
BEAM POSITION MONITORS
Beam Position Monitor block ? On chamber welded
block including 4 button-type feedthroughs
Feedthroughs and BPM blocks tested during
different stages at factory and at site
15
BEAM POSITION MONITORS
Buttons measurements at factory (FMB)
1- After manufacturing Check manufacturing
process Calculate electrical behavior
Sort the buttons before welding
TDR head for reflection measurement
2- After welding on the BPM block Prove
that buttons are OK
3- After baking of the chambers Final OK
before delivery
Capacitance Dispersion lt 1
16
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
17
BEAM POSITION MONITORS
BPMs Electrical Offset measurement at site
Processing of Tx coefficients
H/V offsets
Booster case Max offset kept below 150 µm
18
ALBA FAST ORBIT FEEDBACK
FOFB network
BPM readout electronics
Beam Position Monitors
Correctors Power Converters (PC)
Correctors magnets
Correction CPUs
19
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
20
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
(CopyPaste cheap version of the commonly used
Time Microwave LMR-240)
- 5000m of cable ordered. Assembly of SMA
connector to be done by cabling company
21
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
Corrected
Hardware patch (30). Ethernet cable length...
Not corrected
Wrong voltages (8) ... not used on Libera
Out of specs on BCM (2)
Noisy channel (1)
Out of specs on TbT rms, low ADCs (2)
PM buffer not triggered (1)
22
ALBA FAST ORBIT FEEDBACK
FOFB network
BPM readout electronics
Beam Position Monitors
Correctors Power Converters (PC)
Correctors magnets
Correction CPUs
23
FOFB NETWORK
Distributed architecture using 4 racks per sector
(NT, Diagnostics, Controls, PCs)
24
FOFB NETWORK
Topology based on the use of network spare
optical fibers to Sector 09
25
FOFB NETWORK
Patch panel on Sector 09 will allow any
combination of interconnections
26
ALBA FAST ORBIT FEEDBACK
FOFB network
BPM readout electronics
Beam Position Monitors
Correctors Power Converters (PC)
Correctors magnets
Correction CPUs
27
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
28
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 ß 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
29
ALBA FAST ORBIT FEEDBACK
FOFB network
BPM readout electronics
Beam Position Monitors
Correctors Power Converters (PC)
Correctors magnets
Correction CPUs
30
Power converter
POWER CONVERTERS
Diamond
I/V transducer
ADC
PSI Controller
RS232 service port
Correctos PCs rack
ALBA Controls rack

• Provide 1mrad of DC deflection and 40µrad _at_
  100Hz
• Resolution of 18 bits
• OCEM-Diamond PCs

Tx Board
Electrical ? Optical
Optical
IP modules
Optical protocol management
Correction Calculation CPU
Tested at factory but not yet delivered
Carrier
Commercial
cPCI Bus
31
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
FOFB limiting factor
fH235 Hz fV1550 Hz
- Chamber thickness reduction to 2mm in the
correctors
32
WHATS 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
Storage Ring commissioning May-10
Booster commissioning right after LINAC
33
Preparation work for ALBAs Closed-Orbit BPMs

• 3rd Libera Users Meeting June 2009
• Angel Olmos