Beam tuning should be performed initially and the beam collimator should be
configured so there is little chance of a direct beam hit to the superconducting
magnet coils. As long as its not a direct hit the coils should be able to withstand
heat from the beam shower of secondary scattering. In the 4.4 second spill the
magnet former and coils are gradually increasing. If the heat load to the magnet
Based on what the numbers are we may try to reconfigure the target cell to hold less material and try again.We may also try forced
does not result in any part of the coils rising above the critical temperature (9.7
K) to go resistive then a quench will not occur. Once the beam is well positioned
on target location it is necessary to study what the maximum intensity is that can
be achieved without the target magnet quenching. The UVA simulations indicate
that running at 1×1012 proton per second for 4.4 seconds should be possible but
this pushes the limit.
We will likely need more than 10 quenches for this phase of commissioning:
2 for when are checking this limit for each target cell position
Based on what the numbers are we may try to reconfigure the target cell to hold less material and try again.
We may also try forced convention (pumping on the magnet) to reduce the heat load during to the magnet during a spill.
2 for when we first put the beam on target (leeway): These are accidental and shouldn't happen unless we mess up
with beam width or beam/target position which should all be confirmed before we ramp up the target magnet. Starting
at 5×1010 we should increase in steps of 5×1010 until we get a quench running for10 spills before increasing for each step.
3 for when we get the limit and reproduce it for a full target cell of NH3
3 for when we get the limit and reproduce it for a full target cell of ND3
2 for when are checking this limit for each target cell position
Based on what the numbers are we may try to reconfigure the target cell to hold less material and try again.We may also try forced
convention (pumping on the magnet) to reduce the heat load during to the magnet during a spill.