INTEGRAL SPI Detector Failure
On 19 February, following exit from a perigee passage, there appears
to have been a failure of another SPI Ge detector (#5). This follows
the losses of Ge #2 in December 2003 and and Ge #17 in July 2004. The
MOC and instrument teams are still investigating the anomaly, but the
chance of any recovery is slight. The previous two failures both
occurred some weeks after annealing suggesting a possible link, but
this is unlikely to be the case here since the last annealing finished
in Sept 2008. The failure means that from the original 19 SPI
detectors arranged in a hexagonal pattern we have 16 remaining.
Last updated:Tuesday, 10-Mar-2009 17:34:53 EDT .