Chandra RADMON trigger levels

RADMON will trigger SCS 107 (SI safing) if ANY of the following three EPHIN channels exceeds the on-board threshold for 10 consecutive samples. EPHIN samples are sent to the OBC each 65.6 seconds.

                                                   THRESHOLDS

                                                   LARGE Geom   SMALL Geom
                                    cts/cm^2-s-sr  cts/sample   cts/sample
                                    -------------  ----------   ----------
E1300 (electrons, 2.64 - 6.18 MeV):      10.0        1318.56        78.72
P4GM (protons, 5.0 - 8.3 MeV):          300.0         3542.4       3542.4
P41GM (protons, 41 - 53 MeV):            8.47          100.0        100.0

New thresholds after EPHIN reconfiguration 09 Dec 2008

Name   Contents                         Trigger value
----   -------------------------------- -------------
E150 = E150(old) + P4GM + H4GM + B_noise 800000 
E1300 = E1300 + P25GM + H25GM 1000       1000
HRC    (uncalibrated 2DETART)            30.

Last updated: 12/09/08 BDS