This beam is channeled through a 100 gauss solenoid over a 50 cm interaction length and is collected on a position sensitive detector. The device is placed in the Cooler with the solenoid parallel to the beam axis. The line charge density of the Cooler beam will deflect the probe beam. Maps of this deflection, with the probe beam scanned transversely across the region, will yield the electric field profile of the DC Cooler beam. Particular attention will be directed at observing the electron cooling process.
Spatial resolution depends on the width of the probe beam.
We have already made the probe beam thin enough to measure the position, central density, and width of the Cooler beam. An effort is underway to reduce the probe spot size by replacing the tungsten filament with a LaB emitter, with aspirations of mapping the edges of the Cooler beam. The inclusion of time-dependence is also being considered. Our group has also in principle taken on the task of making a preliminary design for the muon collider accelerating stage. As you can see, we have a very full program here at Indiana.