Bochum 2018 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 61: Instrumentation XVIII

HK 61.5: Talk

Friday, March 2, 2018, 15:15–15:30, HZO 90

Radiation Hardness Test of Silicon Sensors under Realistic Conditions at the Tübingen Van-de-Graaf Accelerator — •Eduard Friske for the CBM collaboration — Universität Tübingen, Tübingen

The silicon strip sensors used in CBM will be subjected to high amounts of NIEL damage. The accumulated dose over several years of operation will be of the order of 10¹³ n_eq(1MeV)/cm². To investigate the effects of the damage under realistic conditions an irradiation setup employing neutrons has been designed and produced. The main feature of the setup at the Tübingen Van-de-Graaf accelerator is the capability to deliver a relativly high neutron flux over an extended period of time (in the order of weeks), thus being closer to the actual irradiation scenario as compared to instantaneous irradiation at reactors.

The setup uses a cryogenic gas target and a 2.4 MeV deuteron beam to produce neutrons via D-D fusion. The irradiated sensor can be read out in place by two beetle chips to assess the possible degradation in performance due to radiation damage. Preliminary data from the irradiation campaign will be presented.