Pete asked what is the cable drop distance from ISB to injector.
Courtesy of John Hansknecht, Fig. 1 shows it's a 34 foot drop distance from ISB floor to tunnel floor, and of course the shorter distance of 25 feet to the elevated injector cable tray.
Note the pre-injector tunnel floor is about 18"? lower than the NL.
IBC-transfer @20 A;
IBC-Main @ 59 A;
Dump sol @ 320 A;
- "sweet" raster using AWF with 4000 pts (from last week)
- Period = 1.5 ms; elliptical coeff = 1.09
- Vpp(H) =0.1603; Vpp(V) =0.1475
- I(H) = 1.058 A; I(V) = 0.883
=> M905 ( fig 1)
=> dumpA, lights on (fig 2)
=> dumpA, lights off (fig 3)
ref: raster OFF (fig 4)
Ahhh, easy to put beam in center of ITVM905 and on IBC dump viewer, but beam not down the axis of IBC. Beam moves arouns when superconducting magnets are cycled. So I put the beam low and left on ITVM905 and we will adjust orbit until beam is stationary when IBC magnets are adjusted.
With the copper target removed, it's not hard at all to center the beam on viewer ITVM905 and put beam on the dump viewer in the desired location. No "dogleg" required. Will we regret centering the beam on ITVM905, or should we come into IBC low and left? Must ponder.
BUrt compare shows differences today, beam through IBC with and without the copper target.
Quads were adjusted to provide beam on viewers that is more circular. Had to adjust the 804 dipole to quad center, correctors were adjusted accordingly. Then note 904 and 904A related to ITV905 viewer.
vented beamline from gun valve to chopper.
Disconnected at each girder, blanked off for transport
Removed gun 2 and 3 laser windows for evaluation.
Blanked y chamber and roughed out, pump on local supply.
Powered UHV ion pump supplies for 1I and 0I regions off and disconnected cables.
Disconnected suitcase, roughed out tee and ion pump on local supply.
Removed PCup cross for easier handling.
All instrumentation, air and water disconnected from y chamber through chopper.
On Friday, Neil Ricky and Bern removed the rooftiles, then Team HDIce rotated the cryostat vertical and removed the copper alignment target, then rotated the cryostat horizontal and restored vacuum, then Neil Ricky and Bern replaced the rooftiles, got the RadCon seal of approval, and beam restored to dump by Monday noon. Not bad, and excellent practice for when we install/replace targets during October, November and December.