RADiation-hard Electron Monitor for JUICE space mission

Radiation Hard Electron Monitor (RADEM) is a particle measurement monitor dedicated to a Jupiter Icy Moons Explorer (JUICE) space mission. Its purpose as a part of a JUICE environmental monitor system is to provide a handful of important information about Jupiter radiation belts such as particle fluxes with their energy ranges, incoming particle discrimination and directionality. Those properties would be of a great importance due to the lack of sufficient and precise measurements so far.RADEM consists of three independent detector systems: Proton and Heavy Ion Stack Detector (P&HID), Electron Stack Detector (ED) and Electron Directionality Detector (DD). Each of them has a dedicated, radiation-hard IDE3466 ASIC responsible for readout, signal conversion and communication with spacecraft. ED is build out of eight silicon detectors, separated by different absorbers, in a way to cover the energy range from 0.1 to 40 MeV. Combined with DD, which is a pixelated silicon detector placed under directional collimator, RADEM is optimized to detect electrons within wide energy range and determine their incoming direction in nearly 2π. Beside that, P&HID will provide additional information concerning proton spectra in a range within 5 and 250 MeV as well as heavy ion discrimination for particle fluxes even up to 10 ^{9}/cm ^{2}/s. The whole instrument inclusive all three detector heads, their PCBs and ASICs, outer shielding and connectors is designed in a way to fulfill JUICE mission requirements, that is for example a total mass below 1 kg and a power on a level of 1 W.Current status of RADEM project is Engineering Model development. Its purpose is to test all important functionalities of the device with assumption, that this model will be as close to the final Flight Model as possible. During this phase the detection capabilities as well as the data collection and processing will be tested with a usage of various measures such as proton and electron beams.