Seminar der Abteilung Strahlenschutz und Sicherheit (ASI)

Die Seminarreihe der Abteilung Strahlenschutz und Sicherheit (ASI) des PSI behandelt unterschiedliche Themen aus Strahlenschutz und Sicherheit, wie z.B. wissenschaftliche Erkenntnisse aus den Bereichen Strahlenschutz, Dosimetrie und Radioanalytik; Erfahrungen aus der Analyse radiologischer Ereignisse sowie Strahlenschutzgrundlagen mit Praxisbezug. Für weitere Informationen und Anmeldung wenden Sie sich bitte an Claudia Nydegger.

Das ASI-Seminar ist offen für alle interessierten Teilnehmenden.  Im Speziellen ist das  ASI-Seminar seit 30.01.2022 als Fortbildung im Strahlenschutz mit einer Unterrichtseinheit für das jeweils unter der Zusammenfassung spezifizierte Zielpublikum vom ENSI anerkannt.

17.01.2023

10:30-11:30 Uhr, PSI Bildungszentrum EG6

Entwicklung und Betrieb eines sicherheitsgerichteten Burn Through Monitor Systems am European XFEL

Wolfgang Clement, Strahlenschutz, Deutsches Elektronen Synchrotron DESY

Abstract

Zielpublikum für Fortbildung im ENSI-Aufsichtsbereich:

14.02.2023

10:30-11:30 Uhr, PSI Bildungszentrum EG6

A highly homogeneous thermal neutron irradiation facility

R. Bedogni, INFN-LNF, Italy

Abstract: HOTNES (HOmogeneous Thermal NEutron Source) is a new type of thermal neutron irradiation facility based on a moderated radionuclide neutron source. HOTNES differs from traditional thermal neutron irradiators in that it exhibits a large closed cavity where macroscopic detectors can fit and be irradiated to a nearly uniform thermal neutron field. The cavity has typical diameter 30 cm, height 70 cm and polyethylene walls. The useful irradiation volume is separated from the source by a polyethylene shadow bar, allowing only multiple scattered neutrons to contribute to the irradiation field. This scheme allows obtaining a thermal neutron fluence rate in the order of 800 cm-2s-1 in the center of the irradiation volume with a fast neutron source of emission rate of about 3.5×106. The facility was designed in such a way that iso-fluence surfaces, characterizing the irradiation volume, coincide with planes parallel to the cavity bottom. The thermal fluence rate across a given iso-fluence plane is as uniform as 1% on a disk with 30 cm diameter. This communication describes the HOTNES design, the corresponding operational prototype and the validation measurements performed with gold activation foils, semiconductor-based thermal neutron detectors and Bonner Spheres.

Zielpublikum für Fortbildung im ENSI-Aufsichtsbereich: 

14.03.2023

10:30-11:30 Uhr, PSI Bildungszentrum EG6

Can luminescence detectors support dosimetry in ultra-high dose rate beams?

Silvia Motta, Abteilung Strahlenschutz und Sicherheit, PSI

AbstractThe development of new accelerators (e.g. laser-driven) and new treatment modalities (e.g. FLASH radiotherapy), which produce beams at ultra-high dose rates (> 103 Gy/s), creates new challenges for dosimetry of such high dose rates. To address such challenges, the PhD project aims at investigating possible dose rate effects in various luminescence materials and their usability for dosimetry in ultra-high dose rate beams.  The talk will provide a progress report of the PhD project: the development of a protocol for dosimetry with luminescence detectors, the application of the protocol in ultra-high dose rate beams, the experimental challenges, and the theoretical questions that still need to be addressed.

Zielpublikum für Fortbildung im ENSI-Aufsichtsbereich: Strahlenschutzsachverständige

18.04.2023

 

10:30-11:30 Uhr, PSI Bildungszentrum EG6

Radiation protection survey for 16 MeV electron FLASH beams

Riccardo Dal Bello, Universitätsspital Zürich

Abstract: The delivery of radiation at ultra high dose rates (>40 Gy/s, FLASH) is of growing interest due to the potential sparing of healthy tissue while maintaining the tumor control, therefore widening the therapeutic window. Consistent and reproducible results from pre-clinical studies are encouraging and are supporting the transition to clinical studies. The first in-human FLASH treatment was performed with a 6 MeV electron beam (CHUV, Lausanne) and the first clinical trial FAST-01 with proton has recently completed enrolment (Cincinnati, USA). In this context, the University Hospital Zurich has converted a decommissioned Varian TrueBeam to deliver 16 MeV electron beams up to dose rates 800 Gy/s and with total delivery times < 500 milliseconds. The short delivery times pose challenges to perform radiation surveys with conventional methods. This seminar reports on the results of short-term survey with active detectors as well as long-term based on passive detectors, covering both photons and neutrons.

Zielpublikum für Fortbildung im ENSI-Aufsichtsbereich: 

16.05.2023

 

10:30-11:30 Uhr, PSI Bildungszentrum EG6

Titel

Referent/Referentin

06.06.2023

 

10:30-11:30 Uhr, PSI Bildungszentrum EG6

Titel

Referent/Referentin

15.08.2023

10:30-11:30 Uhr, PSI Bildungszentrum EG6

Titel

Referent/Referentin

12.09.2023

 

10:30-11:30 Uhr, PSI Bildungszentrum EG6

Titel

Referent/Referentin

17.10.2023

 

10:30-11:30 Uhr, OFLG/402

Titel

Referent/Referentin

14.11.2023

 

10:30-11:30 Uhr, Auditorium WHGA/001

Titel

Referent/Referentin

12.12.2023

 

10:30-11:30 Uhr, PSI Bildungszentrum EG6

Titel

Referent/Referentin