A Small Space Radiation Monitor Capable of Measuring Multiple I_SD-V_GSValues of MOSFET

Abstract

A small space radiation monitor capable of taking measurements of gate voltages of MOSFET for various drain currents has been developed for flight experiments aboard satellites. Measuring multiple I SD -V GS values of MOSFET is expected to provide better understanding of the electronic response to ionizing radiation in space. In particular, separating the effects of oxide charge densities, interface charge densities, and temperatures is anticipated for the accurate determination of total ionizing dose. Description of the instrumentation for space-borne measurements is given, along with a summary of the anticipated results from this experiment.

Using RADFET for the real-time measurement of gamma radiation dose rate

“…On the other hand, in many practical applications it is necessary to measure the absorbed dose in real-time in order to keep a record of the radiation exposure. For these reasons, RADFETs have been utilized as real-time absorbed dose monitors in space missions [9][10][11][12], medical diagnosis and therapy applications [13][14][15][16][17] and high-energy-particle experiments employing static and pulsed radiation fields (for example, Large Hadron Collider experiments in CERN) [18,19]. The realtime absorbed dose monitoring in RADFET-based applications is achieved with specialized instrumentation [19,20].…”

“…Besides measuring the absorbed dose, the information on the dose rate is very important when real-time radiation monitoring is required. In the space environment the dose rate is not known in advance and therefore it has to be measured online for assessing the nature of space radiation sources and for evaluating the effects of space radiation on electronic equipment in spacecrafts [9]. Similarly, in medical diagnosis and therapy the online monitoring of the dose rate is essential for planning and conducting the irradiation procedures [13,14] and in high-energy-particle experiments the dose rate has to be measured online in order to achieve full control of the experimental procedure and also for scientific analysis [18].…”