Attenuators

Info

In the beam line area by the beginning of the MEBT area, there are four attenuators. These devices essentially can cut down the amount of beam that is being sent and are useful tools to reduce the beam power down.

Each attenuator has multiple attenuation values that you can pick and combine, with those attenuation values being: 2x, 5x, 10x, 20x, and 100x. These devices are great for getting the beam to a very small current, something that the Fragment Separator group may need during SDT.

When using attenuators, they can alter the structure of the beam. This will interfere with the work that AP does during Primary beam development time, so when they request certain power levels it is best to use other devices instead.

Tips/Notes

The attenuation combination you might use to achieve a certain attenuation factor may produce a different beam power than another combination. Ex: If you want an attenuation factor of x500, you use D0957-1 at 5x and D0957-2 at 10x to get 500x. You could also use D0957-2 at 5x and D0974-1 at 100x as well. However, due to the orientation of the attenuators, both combinations will yield slightly different power levels in the end.

Location

MEBT

phoebus

Devices

D0957-1

D0957-2

D0974-1

D0974-2