37 lines
1.1 KiB
Markdown
37 lines
1.1 KiB
Markdown
# THHΘR Cosmic Ray Sensor
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## Sensor
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CHAOS Jr: HET BGO and 2× HETB.
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- BGO: 2 photodiodes × 2 gains = 4 channels
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- HETB: 2 detector × 2 segments × 2 gains = 8 channels
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## Electronics
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- single 5…20V power supply
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- 37 pin Omnetics Bilobe connector to the preamps board, A28200-037
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- detector bias voltage, positive or negative
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- 12 channel DORN readout, dual gain (with six preamps)
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- with Beau-SK type preamps
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- 10LC25 FPGA
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- ATtiny824-XF
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- AT45B161E for FPGA bitfile and data
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- 3.3V UART (optional RS485 half duplex) ifc to OBC
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- optional HSS serial ifc/spacewire.
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- optional MS5534 pressure sensor for balloon missions
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### Transformer
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- 4 turns, thick, Vcore, 1.25V, directly regulated.
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- 12 turns, thick, primary.
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- 12 turns, medium, SEPIC, 4.5V digital, LDO regulators Vpll=2.5V, Vio=3.3V, Vadc=3.3V.
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- 19 turns, medium, +7.5V, LDO regulators +5V shaper, preamps, fets.
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- 19 turns, medium, -7.5V, LDO regulators -5V shaper, preamps.
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- 19 turns, thin, Vbias cascade.
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## Charge Sensitive Amplifier
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