Hi Chris
The Stop Masters are pretty much UNCHANGED. Nothing added,
nothing taken away (like Tropicana?)
What has changed is that the stop out of the Stop Master now
goes to the new/old Latching Scaler.
So I think I had better answer a different question -- the
info contained in Equipment 37 for the latching scaler.
There is one Latching Scaler per microvax, read out in
equipment 37. Equipment 37 is read out by all of the triggers going
into the Stop Master (some redundant timing between the WFD STOPS is
performed for non-LaMoSsKa events), and of course equip 37 is also
read by lamosska.
IE. Triggers 2,7,8,9,11,12, and 14 all read out equip 37.
In addition, Trigger 11, LaMoSsKa reads out equipment 38. 38
contains only the LaMoSsKa readout of the WFD based on the bits in the
latching scaler (described below). Since we are reading out entire
SMs in the WFD we decided to put this readout in a section of camac
list that only LaMoSsKa triggers could execute. Otherwise a simple
glitch like a single bit being stuck on might fill all of MACRO's
disks in a matter of hours.
Note that Trigger 11 does NOT read out equipment 40, the Stop
Masters. If it did we might see no Q errors on LaMoSsKa only events
(which should never happen) since LaMoSsKa does not stop the Stop Masters.
So here is the structure of Equipment 37 -- see the
documentation for the old latching scaler also. Note that a full
decoding of the old latching scaler should still decode the new
equipment. (Chris, note that the old macrofar LS decoding only
contained the hit pattern, not the times - I can forward appropriate
decoding if you are interested)
Happy monopole hunting!
Chris Orth
16 Bit WORDS Description
1 Time for Lamosska SM1 end 0 or SM1 end 1
2 Time for Delayed Lamosska SM1
3 Time for WFD STOP, SM1
4 Time for Lamosska SM2 end 0 or SM2 end 1
5 Time for Delayed Lamosska SM2
6 Time for WFD STOP, SM2
7 Pattern of Stops sent by actel (unused
but read out anyways for historical consistency)
8 Pattern of Hits latched
Bit 0: Lamosska SM1 end 0 -- drives WFD readout
Bit 1: Lamosska SM1 end 1 -- drives WFD readout
Bit 2: Delayed (106usec) Lamosska SM1 end 0 or end 1
Bit 3: unused
Bit 4: WFD Stop SM1
Bit 5: unused
Bit 6: Lamosska SM2 end 0 -- drives WFD readout
Bit 7: Lamosska SM2 end 1 -- drives WFD readout
Bit 8: Delayed (106usec) Lamosska SM2 end 0 or end 1
Bit 9: unused
Bit 10: WFD Stop SM2
Bit 11: CSPAM 23 (unused)
Bit 12: CSPAM 34 (unused)
Bit 13: CSPAM 45 (unused)
Bit 14: !(CSPAM 23 || CSPAM 34 || CSPAM 45)
9 Pattern of coincidences latched (useful?)
Bit 0: Lamosska SM1 end 0 plus coinc
Bit 1: Lamosska SM1 end 1 plus coinc
Bit 2: Delayed (106usec) Lamosska plus coinc
Bit 3: unused
Bit 4: WFD Stop SM1 plus coinc
Bit 5: unused
Bit 6: Lamosska SM2 end 0 plus coinc
Bit 7: Lamosska SM2 end 1 pluc coinc
Bit 8: Delayed (106usec) Lamosska SM2 pluc coinc
Bit 9: unused
Bit 10: WFD Stop SM2 pluc coinc
Bit 11: !CSPAM 23 (unused)
Bit 12: !CSPAM 34 (unused)
Bit 13: !CSPAM 45 (unused)
Bit 14: coinc