1. anticic@irb.hr1/6 NA61 vertex detector Status update from RBI effort Tome Anticic Ru đ er Bošković Institute

2. Why NA61 vertex detector? anticic@irb.hr2/6 Significantly better vertex resolution, particularly useful for open charm physics D 0  K  Technology candidate I : Gridpix – Gas based silicon pixel readout (also considered by ATLAS, LHCb) VT1 target proton/Pb beam

3. Things that were meant to be done by RBI by today anticic@irb.hr3/6  Getting the GOSSIP detector to work/ readout  Testing it locally at RBI using Sr90 and laser  … However, continuing delays from NIKHEF in getting a functioninng batch of the Gridpix chips prevented this, so no detector yet is available at RBI, and will not be at least before late fall 2012. Perhaps technology candidate II : CMS Pixel upgrade?

4. CMS Pixel Detector Activities 4  RBI Group in the CMS Experiment (CERN) has joined the upgrade project of the CMS Pixel detector  Strong link to the Paul Scherrer Institute (Switzerland), leading world expert in Pixel detectors for HEP. PSI leads the CMS Pixel upgrade CMS CMS Pixel Detector Pixel size: (100x150) μm 2.

5. CMS Pixel Activities 5 Several trips to PSI/CERN done: – Learn the hardware and testing procedure in the lab – Understand Pixel data, calibration and data quality control – Participation in CMS pixel detector operation and DAQ at CERN Bought pixel module with from PSI. Will arrive in a few weeks. – Planned detector test and further development at IRB, including beam tests Participation of PSI pixel experts at Silicon Workshop in October 2012 in Split, Croatia. Interested NA61 members more than welcome- we will be able to pay for trip/stay. Collected Pixel Charge with LHC 2012 Collision data Pixel module

6. Manpower from RBI anticic@irb.hr6/6 Will be able to use, in addition to RBI NA61 staff, to a certain degree that it does not interfere with CMS activities, manpower for the RBI CMS group: Davit Chokheli (postdoc, till June 2013) Vuko Brigljevic (permanent staff) Jelena Luetic (grad student) One/two technician/s