ESS DTL diagnostics Benjamin Cheymol DTL internal review

ESS DTL diagnostics Benjamin Cheymol DTL internal review, Legnaro 2012 -09 -06

DTL BI layout (may baseline) Tank 1 BLM Tank 2 BLM Beam FC FC WS WS 0 Tank 3 Tank 4 BLM WS FC FC Symbol Name Number of units DTL Tank Wire Scanner BLM Beam Loss Monitor Energy degrader Based on SNS BI layout Symbol 4 3 6 FC Name Number of units BPM / Phase detector in DT Current Monitor (Toroid) Faraday cup (Beam stop) 8 4 4 3 2

Integration-example from SNS Coutesy of SNS BI group

Issue • Change BI layout according to the new DTL design – Need for 4 BPMS in first tank – Match the energy for the FC energy degrader • BPM and BCM integrated in empty drift tubes • Mechanical integration is difficult • Thermal load on the wire scanners and FC can be an issue 4

Open questions • Integration in empty drift tube can affect the design of both instrument and drift tube, the intertank area is also challenging. • Determine the responsibility of the design: • BPM/BCM/WBS » ESS BI will provide electronic and can perform simulations » Mechanical design (integration) of the BPM and BCM, need to be done in tight coordination with DTL design ? • Who will be in charge of the intertank region? » Mechanical design of the tank? » Motion control design (FC)? • Is there a need for a liaison person in Legnaro for BI? 5

Spare Maximum temperature on a carbon wire during the slow tuning mode (1 Hz, 50 m. A, 100 μs) at the exit of the first DTL tank (beam sizes are 2 mm in both planes). 6

Spare Maximum temperature on a tungsten wire during the slow tuning mode (1 Hz, 50 m. A, 100 μs) at 80 Me. V(beam sizes are 2 mm in both planes). 7

Maximum expected current on the wire in function of the beam energy in SEM mode for carbon wire (black line), tungsten wire (red line) and in shower mode (blue dots). 8