Pokročilé detektory pro lepší rozpoznání neutronů a gama záření v prostředí

AbstraktAbstract

The main aim of the project is to develop a portable highly efficient and large area neutron sensitive detecting device for measurement of composition and spectral characteristics of mixed radiation fields. The device development tends to use in environmental and health research with a special attention to radiation protection and medical use of radiation. It is also proposed to operate a system of multiple detectors in network controlled via a web interface. The project is based on established previous cooperation of all partners that are involved with already well-defined roles. For the project purpose a new compact multilayer silicon strip detector based on technologies and know-how on strip and pixel detectors available at SINTEF, and on experience with a broad exploitation of these detectors in IEAP CTU will be designed and developed. To read the signals from the compact multilayer strip detectors, the ASIC electronic chips will be used in connection to appropriate interfaces controlled by software developed in cooperation of IDEAS and IEAP CTU. Dosimetric partners from NRPI and CTU represent final users of the developed device. They will take care about device characterization, testing and calibration for specific applications within different radiation conditions.

The proposed project concerns the research and development of highly efficient neutron detectors with spatial resolution on the level of 50-100 µm for neutron cameras and portable dosimeters usable in mixed radiation field by using silicon strip sensors with a pitch of about 75 µm and an area up to 5x5 cm2. For that purpose the single strip sensors will be connected to the corresponding R/O electronics and characterized by means of alpha, beta and gamma radiation, and by neutrons in case of sensors covered by a neutron converter. To verify the fabrication of the proposed sensors and the optimisation of complex assembly and packaging of the detection system using state-of-the-art silicon and micro-machining technology. To demonstrate a functionality of a new detector design concepts (stacking and 3-dimensional micro-structures), the stack of two sensor layers interlaced with 6LiF converter will be measured and results will be compared to existing technology. To verify the potential of the proposed sensors to measure mixed radiation field with improved spatial resolution. To perform experimental in-depth characterisation of the proposed sensors through state-of-the-art assembly and custom readout electronics.

VýsledkyResults

• Polohově citlivý neutronový detektor s VATA GP8Position sensitive neutron detector with VATA GP8
• Evaluation board VATA GP7 with PAD diodesEvaluation board VATA GP7 with PAD diodes
• Evaluation board VATA GP7 with Strip detector with deposited neutron convertorEvaluation board VATA GP7 with Strip detector with deposited neutron convertor
• Evaluation board VATA GP7Evaluation board VATA GP7