There is an option to see when the beam is gone if it is due to lasers or due to the accelerator.

- window next to proton requestion switch

- put middle faraday cup in

- switch mass to stable copper 63Cu

- check faraday cup current. should be around 1-3 nA

- switch back to 59Cu

-Faraday Cup out

- further descption is on a piece of paper upstairs