1. Introduction Status before the 2009 run Results from the 2009 run
TOTEM Status Report
Introduction
Status before the 2009 run
Results from the 2009 run
Shutdown work
Completion work in 2010
Conclusion
LHCC, 17 February 2010
E. Radermacher

2. Inelastic Telescopes:
Introduction: The TOTEM Detectors
~14 m
CMS
T1: 3.1 < |h| < 4.7
T2: 5.3 < |h| < 6.5
10.5 m T1 T2 HF
Inelastic Telescopes:
Roman Pots:
RP2
RP1
LHCC, 17 February 2010
E. Radermacher

3. Status before the 2009 LHC run: T1 Arms
One arm completely assembled on the beam test at H8
mounted on installation cage
Beam test finished
Other two half arms at bldg. 188
one with all CSC and r/o electronics mounted;
other with CSC and boards mounted beginning of March
LHCC, 17 February 2010
E. Radermacher

4. CSC efficiency from muon events
LHCC, 17 February 2010
E. Radermacher

5. Vertex reconstruction from pion events
Using current version of T1 reconstruction tools in TOTEM analysis SW
Cu target
beam monitor
frame
LHCC, 17 February 2010
E. Radermacher

6. Two quarters of the T2 telescope installed in CMS
LHCC, 17 February 2010
E. Radermacher

7. T2 status before the 2009 LHC run
• Until mid October the full T2 detector was almost commissioned and responding correctly. HV, LV, gas, cooling, DAQ and DCS working correctly.
• However, the week before the CMS forward region closed, the minus end half started to behave erratically on the control loop. Although a large effort was made to cure the problem we did not manage to get a response from the control loop.
Therefore we had to run during December with only one half of the T2 telescope.
LHCC, 17 February 2010
E. Radermacher

8. The Roman Pot Module
All modules installed in the tunnel at 147 m and 220 m
LHCC, 17 February 2010
E. Radermacher

9. The Si microstrip edgeless detector
Connectors to detector hybrids
Roman Pot Motherboard
The Silicon Detector Package
Connectors to detector hybrids
Roman Pot Motherboard
VFAT chips
Si microstrip
edgeless
detector
The Hybrid
5 u & 5 v oriented planes
Kapton
pigtail
CE07
support
plate
The “Champignon”
The Si microstrip edgeless detector
12 Detector Packages at 220 m
(61440 r/o channels)
LHCC, 17 February 2010
E. Radermacher

10. RP Status before the 2009 LHC run
Advance/Complete the commissioning of the Detector System
Complete the connectivity of 12 detector assemblies
Run and control the system services with DCS
Readout commissioning with DAQ
Control loop power-up and test (CCUM, DOH…)
FE hardware probing and programming
r/o tests with CalPulse Scans and Sensors ON
First tests with beam
Low Voltage Distribution
High Voltage Power UP
Problems found, cured during shutdown (see later):
Only one portion of the RP System could run functionally and take data
LHCC, 17 February 2010
E. Radermacher

11. Results from the 2009 run: RP Movement
First Movements of the Roman Pots Towards the LHC Beam on 29 November
Result: Beam at +350 µm
LHCC, 17 February 2010
E. Radermacher

12. Hits and Tracks in the Silicon Detectors
beam
track
First Proton Track in the RP Detectors
Side view on detector planes
Beam 1 2
Transverse view on
first 2 detector planes
on 15 December
LHCC, 17 February 2010
E. Radermacher

13. First Tracks in the T2 Telescope
Event taken at 2.36 TeV
LHCC, 17 February 2010
E. Radermacher

14. T2: Vertex Reconstruction and Hit Map
LHCC, 17 February 2010
E. Radermacher

15. T1 shutdown work (1) fixing blocks brackets
• HV/LV distribution cabling tested up to HF platform.
• Only patch panels and a few pipes for gas/cooling installed on + side.
• Installation of cables on YE3+ stopped for safety reason.
• Fixing blocks welded on YE2+ on 18 January
fixing blocks
brackets
LHCC, 17 February 2010
E. Radermacher

16. Truss installation test and survey on ‘+’ side on Jan 27
T1 shutdown work (2)
Truss installation test and survey on ‘+’ side on Jan 27
smooth operations with new insertion tool
surveyed points on “Near” side
LHCC, 17 February 2010
E. Radermacher

17. Feet of reference frame
RP shutdown work: Curing the HV short
By design 200 µm of clearance between the sensors and the thin window.
Pot Envelope
Reference frame
Sensor
Instead, to keep the parallelism between the top reference surface and the bottom of the pot, the bottom plate surface was milled reducing its thickness by 200 µm.
Feet of reference frame
Points of contact
Solution: replace the reference frames with new ones (feet 250 µm longer) to regain the original clearance.
LHCC, 17 February 2010
E. Radermacher

18. RP shutdown work: the rest
The LV power supply was hitting the current limit during testing operations or resetting leading to an instability of the control loop and the data transmission.
Therefore the number of LV channels was increased and the cables and connections changed accordingly.
To cure the HV problem all 12 detector packages were extracted, the new reference frames mounted, all sensors inspected and tested and the LV connectivity revised. Then all detector packages were re-installed and connected.
Additional consolidation work: Pirani gauge on vacuum system, calibration of pressure sensors, Calibration of motors and survey of BPMs. At present final motor and interlock test with CCC.
Actual status: Vacuum and Cooling system operational, DCS for LV, HV, and RADMON operational, DSS implemented. Control loop synchronized, data transmission operational, R/O with test pulses completed (99% of VFATs fully functional), trigger data transmission in test.
LHCC, 17 February 2010
E. Radermacher

19. During Christmas holidays both HF platforms where put in the garage.
T2 shutdown work
During Christmas holidays both HF platforms where put in the garage.
We had the chance to replace the misbehaving card on Minus Near side.
We found that a chip was mechanically broken on the good quarter (Minus Far) and had to repair it.
Now the detector is working and the commissioning finished.
LHCC, 17 February 2010
E. Radermacher

20. Completion work in 2010 (1) T1: T2:
• The second half of T1 has to be finalised and tested in H8.
• In a technical stop during 2010 the complete T1 telescope must be installed.
• This requires:
• Completion of the piping on the CMS + side;
• Insertion of the detector on the + side;
• Truss insertion and survey on the – side followed by the installation of the detector.
• We have to set up a planning with CMS to allow a correct and safe installation during a forthcoming stop.
T2:
• During the coming run extensive trigger studies will lead to background studies, tuning of alignment algorithms and trigger tracking efficiency. This should allow the setting up of a physics trigger to take data.
LHCC, 17 February 2010
E. Radermacher

21. Completion work in 2010 (2) RP:
• The same running scenario as for T2 will be adopted for the Roman pots.
• Although our priority is now the running of the 220 m stations we have to assemble the detectors for the 147 m stations and produce some spares.
• At present the assembly work is slowed down due to the commissioning work at IP5 leaving almost no free manpower for the assembly.
• After the restart of LHC we intend to pursue the assembly, hopefully with additional personnel.
• Before installation all detector packages have to be tested in the H8 test beam.
• These new detectors should be installed gradually during technical stops in Priority is given to the horizontal pots (diffraction).
LHCC, 17 February 2010
E. Radermacher

22. • We gained useful experience with the data taking in December 2009.
Conclusion
• We gained useful experience with the data taking in December 2009.
• The Roman Pots (220 m) and the T2 detector are now fully installed and ready to take data.
• DCS, DAQ and software are ready for the next run.
• For both detectors the trigger scenario has to be studied for efficient data taking.
• Half a T1 detector is ready to be installed in a technical stop, the second will be ready soon.
• We are grateful to the machine people for the continuous support for the data taking with the Roman Pots.
LHCC, 17 February 2010
E. Radermacher