Test Irradiation of the Single Event Upset Rate of the GLINK Transmitter/Receiver
Yong Li March 17, 2001
DUT: HDMP 1022 (TX), HDMP 1024 (RX) Time: March 3, 2001, 7:00-9:30AM. Location: Crocker Nuclear Laboratory, UC Davis Proton beam energy: 63.3MeV Active irradiation area: 2 2cm Experimenters: Yong Li, Michael Medve, Carlos Castaneda (UCD)
Summary of Irradiation Test Result
# of SingleBit-Errors
Sample
# of LinkDowns
Total Single-EventUpsets
Proton Fluence (1012 /cm2)
Total Ionizing Dose (Krad)
Single Event Upset Error Rate (1 SEU per # protons/cm2)
SEU rate at CSC worst location (1 SEU per # of hours)
2.827108 2.915108 2.898108 3.016108 3.091108
52.3 53.9 53.6 55.8 57.2
RX 1 2.65 7368 2004 9372 356.72 RX 2 4.11 11116 2981 14097 553.25 RX 3 4.05 11051 2924 13975 545.34 RX 4 3.91 10179 2784 12963 526.41 TX 1 4.07 11721 1444 13165 548.00 The statistical error for the total proton fluence and the total ionizing dose is 1.6%. The statistical error for the SEU rate at the location of worst radiation of CSC is less than 2%.
The DAQ was started before the proton beam stop was lifted and we saw no error without irradiation. After the beam stop was lifted and protons were dumped at the DUT, SEU errors were seen immediately. After the beam scheduled time was reached, beam stop was placed back into the proton beam to block further irradiation, the GLINK tester was still running perfectly and no more errors were logged. This phenomenon proved that the errors logged were indeed induced by proton irradiation and the system was robust.
3/17/01
1
Some arguments:
The standard we set for qualifying the GLINK components is one SEU error per 42 minutes, assuming each upset causes link-down and the tolerable data loss is less than 0.1% for the whole CSC system. The tested result is about 70 times better than the standard. The fluence of neutrons with E>20MeV at the location of worst radiation of CSC in 10 years is 1.51012 /cm2. This result definitely qualifies the HDMP 102...