July 2nd 2020 » History » Revision 13
Revision 12 (Alexandre Camsonne, 07/02/2020 03:22 PM) → Revision 13/14 (Alexandre Camsonne, 07/02/2020 03:47 PM)
h1. July 2nd 2020 *Updates **VMM3 : Jeff still working - Neigbhoring channel readout : CERN mapping is different with UVA - UVA is mapped one to one so should work and easy to implement - Radiation tolerance of FPGA : rad hardness for SEL (latchup) up to few 100 krads ( space grade 300 krad ) new FPGA, can design for SEU - support chip rad hardness : DC converter / regulator - 300 krad 5 K$ - regular around 100 $ : data for different experiment , might be able to handle radiation needed - avoid FET based regulator and use bipolar - can supply low voltage directly ( but trickier ) - checking parts which could work Rad hard FPGA have built-in error correction and more immune to cell SEU Use 4 bit serial ( 1 bit serial at 70 MHz ) to reload faster - If have GBT, reserve some line for JTAG (GBT full duplex - and has SPI and I2C already ) If SEU to high move FPGA away using cables and / split card VMM FPGA Cubesat uses standard components. **SSP/MPD : check the bad event which might be due to jitter of clock - 12 MPDs 1 Millions events - 2.5 GBit /s : 1 bit corrupted from time to time - was not seen on other setup at 5 g bit so might be on MPD side - scope installed on system - 250 Hz right now - SSP can process data as MPD is sending gives 10 kHz trigger rate for 6 samples - Received 4 to 1 fibers will ask to Xin **MAROC : seven assemblies and got it to run, some noise but small compared to single photon , and operated will Hall B CODA NIM modules for analog output : 9 outputs for 192 channels *Beam July 27th : need evaluate time for installation !https://redmine.jlab.org/attachments/download/1016/IMG_20191203_210642.jpg! !https://redmine.jlab.org/attachments/download/1017/IMG_20191203_210632.jpg! !https://redmine.jlab.org/attachments/download/1018/IMG_20191203_210711.jpg! !https://redmine.jlab.org/attachments/download/1019/IMG_20191203_210726.jpg!