1. Status and experience of Liberas at Soleil
Nicolas HUBERT
Synchrotron SOLEIL
On behalf of Diagnostics group
3-4/04/2008
2nd Libera Users Meeting, ALBA

2. 2nd Libera Users Meeting, ALBA
Libera Status
161 Liberas
Storage ring => units
Booster => 22 units
TL2 => 3 units
Spares and tests => 15 units
In operation for 2 years
no breakdown during operation
Some default were present from the start but not detected
Rockets IO ports => 2 units
Trigger connector => 1 unit
3-4/04/2008
2nd Libera Users Meeting, ALBA

3. Configuration and functionalities
Configuration and functionalities used at Soleil:
Data sources
SA => To monitor and correct the orbit (slow orbit feedback)
FA => To correct the orbit (fast orbit feedback) and monitor noise spectrum
TT => For Machine Physics studies
Decimated TT => To monitor noise spectrum
Interlock (34 BPMs involved today)
Gain dependant (Inhibited if gain < -40 dBm)
Before bending magnets: ± 1mm in vertical
Around mirrors for IR beam lines: ±0.3 mm in vertical
± 10 mm in horizontal (~no interlock)
Automatic Gain Control always activated
Post-Mortem (16 ksamples)
Detuning of ~9 kHz of sampling frequency
External source for switching
3-4/04/2008
2nd Libera Users Meeting, ALBA

4. 2nd Libera Users Meeting, ALBA
Releases Status
Schedule of the releases:
1.46 installed since summer 2007
1.60 and 1.61 installed in February 2008
1.80 and 1.82 installation planed for May/June 2008
Installation of the release 1.60:
1 unit failed
DSC coefficients are erased during the upgrade (learning process has to be redone after the release).
Had to change Ethernet switch configuration from 100M Half Duplex to automatic configuration.
One bug with DHCP process (patched)
3-4/04/2008
2nd Libera Users Meeting, ALBA

5. 2nd Libera Users Meeting, ALBA
Releases 1.80 and 1.82
3 Major improvements for Soleil:
New turn by turn filters without crosstalk between turn
More FPGA space (next presentation)
Beam current dependence correction (for standard Liberas)
3-4/04/2008
2nd Libera Users Meeting, ALBA

6. Beam current dependence correction
Horizontal Beam current dependence (from a generator)
Input level
dBm
5 µm
Position X
3-4/04/2008
2nd Libera Users Meeting, ALBA

7. Beam current dependence correction
Vertical Beam current dependence (from a generator)
10 µm
Position Z
dBm
Input level
3-4/04/2008
2nd Libera Users Meeting, ALBA

8. Beam current dependence correction
P[dBm] A1 A2 h t X[nm] Y[nm]
.....
New gain-dependant offsets
3-4/04/2008
2nd Libera Users Meeting, ALBA

9. Beam current dependence correction
Matlab simulation of the correction:
3-4/04/2008
2nd Libera Users Meeting, ALBA

10. 2nd Libera Users Meeting, ALBA
Wish list for release 2.00
Release 1.82 is not tested yet but should fit Soleil specifications and needs.
Subscription to future release is not decided and will depend on its content.
No demand for the moment.
3-4/04/2008
2nd Libera Users Meeting, ALBA