What is an IUCRF?
What it is
The IUCRF is a custom CAMAC module made at IU. It serves as both an event latch and a computer controlled pulser. We have two of them in the LGD hut. One is used to control the enabling of the BOS and EOS gates, and the other is used to control the DAQ for LGD testing (This is NOT the `E852 DAQ').
How it works
The IUCRF has 1 front pannel input and 6 outputs. Each input/ouput consists of a pair of limo connectors. They are:
- Event In (input)
- Latched Event (output)
- Reset Latched Event (aka Output 1)(output)
- Output 2 (output)
- Output 3 (output)
- Output 4 (output)
- Output 5 (output)
- Output 6 (output)
A NIM signal into `Event In' causes `Latched Event' to go true, and disables further inputs until a reset is recieved, and sets the LAM. Upon receipt of a reset from the computer, `Reset Latched Event' pulses, and the IUCRF is ready for more input. Note that the LAM must be cleared seperatly. The latch cannot be reset via the front panel - it must be done through CAMAC.
The CAMAC commands for the IUCRF are as follows:
- f=8, a=0 : Returns Q=TRUE if LAM is set.
- f=10, a=0 : Clears LAM.
- f=16, a=0 : Fires one of the outputs :
- Data = 0x1 : Fire channel 1, resets latch.
- Data = 0x2 : Fire channel 2.
- Data = 0x4 : Fire channel 3.
- Data = 0x8 : Fire channel 4.
- Data = 0x10 : Fire channel 5.
- Data = 0x20 : Fire channel 6.
All return X=TRUE and Q=TRUE (except f=8, which only returns Q=TRUE if LAM is set).
** 1/11/94 R.L.