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G2P Target installation and Beyond

This document provides an overview of the G2P target installation process, including the schedule, pivot bearings, platforms, and other relevant information. It also covers topics such as cryo system maintenance and engineering division interactions.

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G2P Target installation and Beyond

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  1. G2PTarget installation and Beyond

  2. Schedule

  3. Pivot before

  4. Pivot bearing area

  5. Pivot with Septum support

  6. Pivot with support and platform

  7. Platform with Septum

  8. Platform with septum and dump

  9. Platform with upper deck

  10. Platform with access platforms and stairs

  11. Fully assembled

  12. Installed

  13. Ep before • Coming out

  14. Slow raster • Going in

  15. Upside down girder before • Coming out

  16. Upside down girder after • Going In

  17. Long girder before • Coming out

  18. Chicane after • Going in

  19. Chicane power supply and equipment area

  20. Septum status • Final assembly and magnetic field testing

  21. Spectrometer power supply list • Q1 regulation modules, opto couplers, right SCRs and coolant lines install SCR temp monitors, install control board extension cables • Q2/Q3 Opto couplers, retro fit new SCR banks, Right Q3 transistor replacement, install SCR temp monitors • Dipoles Replace SCRs, lead voltage polarity change upgrade, test spare ZFCT, troubleshoot lead voltage protection circuit, Flush cooling system, install new lead flow meter controllers, install SCR temp monitors

  22. Detectors • Both HRS will be used for electron detections. • We will need for both arms to have :VDCs, S1/S2, Gas Cherenkov and Lead-glass Shower/Per-shower (pionrejectors). In addition, we plan to have a simple 3rd arm: • A small dE (thin scientillators, ~5mm) and E (Thick scinetillators, ~5 cm) detectors. It will be used for monitoring the product of the beam and target polarization by monitoring the elastic asymmetries.

  23. Cryo system • Warm up both spectrometers • Pump all magnets • pump all cryo lines • Replace Q1 JT valve heads with JLab valves • Replace dipole LN2 probes • Replace magnet pressure gauges • Repair left Q1 leads • Replace left Q1 vacuum seals • Replace all Q1 110 vac plugs due to radiation damage • Calibrate Ln2 LL probes • Calibrate weka valves • Repair dipole He LL probe • Replace ball valves on magnet cryo bypass lines • Repair right Q2 LN2 valve • Remove Moeller U tube from pivot • Remove Y can from left Q1

  24. LCW list with manifold pix • Hard manifold to BB power supply to new regulator and distribution manifold to accommodate Big Box and the FZ magnet power supplies. • New distribution manifold at the pivot to accommodate the FZ magnets and the resistor magnet

  25. Power list • New power distribution box to accommodate FZ power supplies and target vacuum cart

  26. Engineering Division Interaction • Interaction has been very good so far and I believe that we can maintain communication and coordination through the 7:45 and Wednesday meetings.

  27. What we have done before • What we have done before • Installation of the septum magnet system (less the 3rd set of coils) • The septum support stand has been used several times • Target chamber used in Hall C • Target used in Hall C and reworked and tested in the Target lab

  28. Concerns • Target operational readiness The effect of this is obvious. • Lock down of experiment parameters We still seem to be changing the experiment parameters. • LCW capacity due to 2 additional power supplies and 3 additional magnets We are adding another tap from the main line and 2 new manifolds on the old line but this needs to be looked at and we are working with Robin on this. We are also looking at boot pumps. • Alignment support This will be a bottleneck for everybody even with the resource leveling that was done and will need to be watched closely. • We will have major space constraints on the upper platform

  29. Questions?

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