1. RICH Status from last RICH meeting
Cooling tests
HV Power Supplies
Operations

2. CW laser ON
From Ross

3. RICH1 with CW laser ON

4. VIEW FOR NEW RICH 1 ABUTMENT ALONG Z AXIS
Foreseen for the 13th of May, will happen on the first week of June

5. Schedule for RICH 2 Intervention
16-20 Feb
He leak tests (DONE)
Starting compressor (DONE)
23 Feb – 6 Mar
LHCb week (DONE)
LAMS C-side (DONE)
9-15 Mar
16-21 Mar
First batch tested (DONE)
Second batch tested (DONE)
19-26 Mar
Exchange C-side tubes* (DONE)
RICH2 tests
26-2 Mar-Apr
Exchange A-side tubes* (DONE)
*A second intervention later in the year is foreseen

6. February RICH2 Datapoint (from Ross)
40 HPDs have been exchanged
C3_0, 2 and C6_1 L0 boards C3 LV Reg.
4/3/2009
R. Young 6

7. RICH2 after refurbishement databases not yet updated (from Ross)

8. RICH2 after HPD refurbishment and new CW laser illumination
A side C side

9. Coolant leaks
Coolant leaks around RICH1 and RICH2 were tackled and fixed;
The Cooling plant + Piping are now being checked by the responsible people to further reduce the leaks

10. Coolant Loss after the HPD Replacements
~0.44 litres per day

11. HV “Glitches” U0 HV channel resp. D0 HV
Some HV channels show consistently glitches in current (over-) then in voltage (under-) (see last rich meeting from Flavio also). Possible offenders: ISEG, connectors or cable. All our data point to the ISEG (ongoing).
ISEG experts have pinpointed where the problem lies and are ready to fix it (whole RICH1 HV supply is travelling now for Dresden). Presentation from Flavio follows.

12. All current spikes in RICH 1 D: August 2008 – April 2009
Column
Sat spike
(2-10muA)
>10muA
R1 D0 61 57 4
R1 D1 9 29 14
R1 D2 41
109 20
R1 D3 5 21 6
R1 D4 1 31
R1 D5 7
R1 D6 12
from Dave

13. All current spikes in RICH 1 U: August 2008 – April 2009
Column
Sat spike
(2-10muA)
>10muA
R1 U0 1
R1 U1 5
R1 U2 8
R1 U3
R1 U4 15
R1 U5 2 13
R1 U6
from Dave

14. RICH Commissioning and Operation
Tests on RICH1 and RICH2 continue:
L0 calibrations (reverse voltage cal. for RICH2 achieved by Philip)
New mask for noisy pixels
Timing tests
High rate tests
Monitored HV ramps
IFB runs
MDMS
Test with LHCb magnet towards end of July
Archiving not yet reliable
Update of databases

15. Reminder: Erich and Olav are welcoming you…..
A big thank from the whole RICH collaboration to the people who made the “HPD refurbishing” operation a success!
Reminder: Erich and Olav are welcoming you…..