Irradiation Program P Dervan Liverpool University Paul Dervan

Irradiation Program P. Dervan Liverpool University Paul Dervan, UK Upgrade Annual Review, 2011, RAL

Contents • CERN PS • Birmingham Cyclotron Paul Dervan, UK Upgrade Annual Review, 2011, RAL

§ § CERN PS, T 7 Facility T 7 extracted 24 Ge. V proton beam, profile ~ 1 x 1 cm 2. Flux about 1 -3 E 13 p/hour/cm 2 50 cm long table + thermally insulated box, scanned horizontally through 10 cm. Space for maximum of three 10 x 10 cm 2 sensors + some passive materials. Monitor currents, temperature and fluence during the irradiation 3 Sensors (biassed) RPC beam monitor + Activation Foils (at Entry and Exit) Thermally insulated box Scan Table PS-T 7 area, irradiation facility maintained by M. Glaser Paul Dervan, UK Upgrade Annual Review, 2011, RAL

Temperature sensors on hybrid termistors. T on silicon much lower. Temperature of cooling (inlet and outlet). T on silicon higher. Paul Dervan, UK Upgrade Annual Review, 2011, RAL

Reverse Current Module, biased (-100 V), powered and clocked Paul Dervan, UK Upgrade Annual Review, 2011, RAL

Detector Irradiation (May 2010) NB: key is the other way round § § § One bare sensor and one sensor with hybrid glued on it Irradiated to 1. 82 × 1015 p/cm 2 Reverse current at the end of irradiation (black with bare sensor, red with hybrid). Temperature on chiller at -16 o. C No degradation due to gluing of the hybrid onto the sensor. Paul Dervan, UK Upgrade Annual Review, 2011, RAL

Stave module irradiation (August 2010) Column 0 Column 1 Pre-Irrad 610 589 Post-Irrad 675 650 Difference 65 61 Expected 670 640 § Two modules irradiated in 2010 (one active, one passive) § They were irradiated to 1. 9 × 1015 neq/cm 2 (more than we expect) § We have a fully functional module after 1. 9 × 1015 neq/cm 2 Paul Dervan, UK Upgrade Annual Review, 2011, RAL

Current and future use of the PS Current § Irradiating carbon fibre sandwiches as I speak § Noise investigation for SCT Future § Stavelet irradiation? § Modules with new chips (130 nm) § Moving into QA for sensor and module QA Note PS will be shut down in 2013, need an alternative facility Paul Dervan, UK Upgrade Annual Review, 2011, RAL

Birmingham Cyclotron § 30 Me. V proton beam § Similar cold box as the PS § High doses, 1016 neqcm-2 can be achieved in 2 days § Limit the amount of material § Pin diode/foil dosimetry § Valuable asset when PS is off Paul Dervan, UK Upgrade Annual Review, 2011, RAL

Current Situation § § Cold box installed in the beam line Checked that all cables etc. . fit Kit ordered for control and monitoring Not all has arrived yet Paul Dervan, UK Upgrade Annual Review, 2011, RAL

Plans for Birmingham § Need to commission the system as soon as the kit arrives § Test irradiation with pin diodes and pad detectors § First irradiation with optical fibres is scheduled for the start of June Paul Dervan, UK Upgrade Annual Review, 2011, RAL

Summary PS Facility § Up and running. § Has already be used for detector and module irradiations. § Will continue to be used for QA Birmingham Facility § New facility § Tests will start this month § First irradiation of fibre optics in June. Paul Dervan, UK Upgrade Annual Review, 2011, RAL

Backup Slides Paul Dervan, UK Upgrade Annual Review, 2011, RAL

IV Measurements (Post-Irrad) Chiller [°C] Freezer Block [°C] Hybrid [°C] Expected Si [°C] Module Off -20 ON -19 -21. 5 Module On -25 ON -20 -18 -17. 5 Paul Dervan, UK Upgrade Annual Review, 2011, RAL

Fluence Measurement Al foil (1 cm × 10 cm) cut into 10 pieces Front: 3. 04 × 1015 p/cm 2 Back: 3. 18 × 1015 p/cm 2 1. 90 × 1015 neq/cm 2 Foils Paul Dervan, UK Upgrade Annual Review, 2011, RAL

Noise (Top Hybrid) Column 0 Column 1 Pre-Irrad 610 589 Post-Irrad 675 650 Difference 65 61 Expected 670 640 Paul Dervan, UK Upgrade Annual Review, 2011, RAL

Noise (Bottom Hybrid) Column 0 Column 1 Pre-Irrad 613 638 Post-Irrad 667 694 Difference 54 55 Expected 662 688 Paul Dervan, UK Upgrade Annual Review, 2011, RAL