17 Oct 1996
| C2 | Collimator 2 | -412000 mm |
|---|---|---|
| C3 | Collimator 3 | -412000 mm |
| C6 | Collimator 6 | -341000 mm |
| T1 | Trigger 1 | -160000 mm |
| C9 | Collimator 9 | -147000 mm |
| T2 | Trigger 2 | -100000 mm |
| T3 | Trigger 3 | -62000 mm |
| RC | CEDAR | -58000 mm |
| T4 | Trigger 4 | -54000 mm |
| S0 | Beam Counter | -39710 mm |
| S1 | Beam Counter | -39460 mm |
| W1 | Window | -38880 mm |
| BPD1 | Beam Position Detector | -38782 mm |
| W2 | Window | -38740 mm |
| MBPL | Bending Magnet for beam cal. | -36907 mm |
| W3 | Window | -16520 mm |
| BPD2 | Beam Position Detector | -16430 mm |
| W4 | Window | -16390 mm |
| S2 | Beam Counter.(in vac) not used for Pb | -15780 mm |
| V0 | Veto Scint. with hole (in vac) | -15530 mm |
| FISC | thin scint. wires | -14746 mm |
| W5 | Mylar window | -7530 mm |
| Target0 | 0.5 mm Ta for multi-target runs | -7523 mm |
| BPD3 | Beam Position Detector (not used) | -6576 mm |
| LHT | Liquid Hydrogen Target | -5800 mm |
| W6 | He-bag Mylar window | -5300 mm |
| VM1 | Vertex 1 Magnet and VTPC1 | -3802 mm |
| S4 | Beam Counter | -1943 mm |
| Target2 | 0.5 mm Ta for multi-target runs | -1884 mm |
| VM2 | Vertex 2 Magnet and VTPC2 | 0 mm |
| Target3 | 0.5 mm Ta for multi-target runs | 1571 mm |
| W7 | SAC He-bag; Mylar window | 1575 mm |
| W8 | SAC He-bag; Mylar window | 3325 mm |
| W9 | MTPC He-bag; Mylar window | 3325 mm |
| W10 | MTPC He-bag; Mylar window | 8525 mm |
| S5 | Veto counter | 9400 mm |
| Ring | Ring Calorimeter front face | 13800 mm |
| Coll | Collimator front face | 19200 mm |
| Veto | Veto Calorimeter front face | 21800 mm |
Adjust the beam intensity by moving the collimators. Collimators 2, 3, and 6 should be approximately the same. If you are closing the collimator, it first opens all the way, so first put the plug (TAX) in to -100 mm. To do so on the EANORTH terminal type RUN TREE, go to TUNE, SPECIAL, TAX, 1, and set to -100. If you are opening the collimator this is not necessary. To move the collimator itself chose TUNE, SET, COLLIMATORS, 2, and type in desired value.
Adjust the beam intensity by moving the collimators. Collimators 2, 3, and 6 should be approximately the same. If you are closing the collimator, it first opens all the way, so first put the plug (TAX) in to -100 mm. To do so on the EANORTH terminal type RUN TREE, go to TUNE, SPECIAL, TAX, 1, and set to -100. If you are opening the collimator this is not necessary. To move the collimator itself chose TUNE, SET, COLLIMATORS, 3, and type in desired value.
Adjust the beam intensity by moving the collimators. Collimators 2, 3, and 6 should be approximately the same. If you are closing the collimator, it first opens all the way, so first put the plug (TAX) in to -100 mm. To do so on the EANORTH terminal type RUN TREE, go to TUNE, SPECIAL, TAX, 1, and set to -100. If you are opening the collimator this is not necessary. To move the collimator itself chose TUNE, SET, COLLIMATORS, 6, and type in desired value.
Should normally be removed. It has 50 cm air and two Mylar windows, each 0.1 mm thick.
On the EANORTH terminal type RUN TREE. To move the collimator chose TUNE, SET, COLLIMATORS, 9, and type in desired value.
Should normally be removed. Has 50 cm Air and 2 Mylar windows of 0.1 mm each.
Should normally be removed. Has 50 cm Air and 2 Mylar windows of 0.1 mm each.
Is made up of 600 cm He and 2 0.4 mm thick aluminum windows. For more information see NA24 beam line folder.
Should normally be removed. Has 50 cm Air and 2 Mylar windows of 0.1 mm each.
50 mm x 40 mm x 5 mm Scintillator for proton beam. PM tube = XP2020; Max HV=3000.
This counter is mounted on a vertical stage, which can be controlled from inside the counting house in Rack 17.
The HV has to bet set to zero before the vacuum in the beam pipe is either broken or reestablished!
Responsible for this Detector: Marburg group
50 mm x 30 mm x 5 mm Scintillator for proton beam. PM tube XP2020, Max HV=3000.
This counter is used as the positive beam defining counter for ions and, in addition, as time=0 for TOF.
This counter is mounted on a vertical stage, which can be controlled from inside the counting house in Rack 17.
The HV has to bet set to zero before the vacuum in the beam pipe is either broken or reestablished!
Responsible for this Detector: Marburg group
This detector measures the beam position in x- and y- directions perpendicular to the beam. Each strip is 16 mm wide and they have a 2 mm pitch.
The nominal x- and y-coordinates of its center are
Responsible for this detector: H.G. Fischer CERN and P. Freund, MPI Muenchen
Its maximum bending power for a 400 GeV/c particle (corresponding to 160 GeV/c Pb beam) is appr. 10 cm at VTPC1. Either spectator protons or secondary hadrons have to be used.
This detector measures the beam position in x- and y- directions perpendicular to the beam. Each strip is 16 mm wide and they have a 2 mm pitch.
The nominal x- and y-coordinates of its center are
Responsible for this detector: H.G. Fischer CERN and P. Freund, MPI Muenchen
This counter is mounted on a vertical stage, which can be controlled from inside the counting house in Rack 17.
The HV has to bet set to zero before the vacuum in the beam pipe is either broken or reestablished!
Responsible for this Detector: D. Vranic, CERN
This counter is mounted on a vertical stage, which can be controlled from inside the counting house in Rack 17.
The HV has to bet set to zero before the vacuum in the beam pipe is either broken or reestablished!
Responsible for this Detector: D. Vranic, CERN
The detector is used to scan the profile of the beam in the plane perpendicular to the beam. Also, the wires can be positioned in the center and scanned with TRIM5 and TRIM6 to fine tune the beam position.
Normally the FISC is aligned such that the reading 0.0 gives the center of the nominal beam. At present (Sep 96) the beam is at - 4 mm on the internal FISC scale.
Responsible for this detector is the external beam group.
Responsible for this item: H. Stroebele Univ. Frankfurt and S. Wenig, CERN
This detector measures the beam position in x- and y- direction perpendicular to the beam. Each strip is 16 mm wide and they have a 2 mm pitch.
Material in the beam: 0.125 mm Mylar and 24 mm Ar(CH4) gas.
The nominal y-coordinates of its center is Y_center = 0 mm. It is mounted on a stage movable horizontally remotely controlled from the counting house. To operate the stage go to the Laser Macintosh and choose on the front panel item SMK control The corresponding window allows one to move the stage. Coordinates are in the standard NA49 system.
The stage can also be moved locally by activating one of the end switches; the stage will then move away from that switch. If you move it locally with the remote/local switch of the driver board (see rack 21, lowest crate) on local, you lose position control. In case it happens, it can be recalibrated by moving the detector into the canonical beam position (655.0 mm on the scale fixed to the upper rail) and resetting the counter of the stage control to 0.
Responsible for this detector: H.G. Fischer CERN and P . Freund, MPI Muenchen
Separated from the vacuum by 0.075 mylar windows on both sides; in a target vacuum vessel extending from z=-7420 to z=-57902. The upstream window of the vessel has a diameter of 30 mm (0.05 mm Mylar) and the downstream window a diameter of 180 mm (0.125 mm Mylar).
For magnet operation see the magnet control screen.
For horizontal movement see BPD3.
For description of VM2 see VM1.
The nitrogen supply labeled "LASER" in the gas cave has to be open for operation. Also, the pressure reducing valve on top has to be open. One of the two indicators will be lit, if there is pressure in the corresponding line to the cylinder. There are additional valves after the sensors in these lines which have to be open! They are mounted on the front face of VTX1 at the very lower left side. The indicators light up, if the corresponding limit positions are reached. Thus the target may be in the beam if the "target out" light is not lit.
It is used for multi-target runs only This counter is mounted on a stage movable in the plane perpendicular to the beam, which is remotely controlled from the counting house (rack zz).
The current (Sep 96) nominal positions in the beam for field-off
Please send corrections to Herbert Stroebele
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