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stations [2013/12/24 08:28]
pereira |
stations [2013/12/24 08:31]
pereira [Target Station] |
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| ===== Target Station ===== | ===== Target Station ===== |
| The target station is located in the pivot point of the S800, right in front of the quadrupole and first dipole of the spectrograph (see picture below). The standard configuration of the S800 used to employ a scattering chamber that contains a ladder for holding the targets. This ladder is mounted on a drive that allowed for continuous rotation as well as vertical translation for the fine adjustment of the target position and thickness. This scattering chamber also contains two fixed-position drives movable by 1" increments located in front of the target, as well as a table that can be inserted from the chamber top covering the whole area of the chamber. The inside dimensions of this chamber are 1 m along the beam axis by 1 m transversally. It can be configured for a fixed set of spectrograph angles using a set of welded front flanges for 0°, 5°, 8°, 10°, and 18°. | The target station is located in the pivot point of the S800, right in front of the [[Magnets#Spectrograph Quadrupole Doublet|quadrupole doublet]] of the spectrograph (see picture below). The standard configuration of the S800 used to employ a scattering chamber that contains a ladder for holding the targets. This ladder is mounted on a drive that allowed for continuous rotation as well as vertical translation for the fine adjustment of the target position and thickness. This scattering chamber also contains two fixed-position drives movable by 1" increments located in front of the target, as well as a table that can be inserted from the chamber top covering the whole area of the chamber. The inside dimensions of this chamber are 1 m along the beam axis by 1 m transversally. It can be configured for a fixed set of spectrograph angles using a set of welded front flanges for 0°, 5°, 8°, 10°, and 18°. |
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| A much larger scattering chamber is available to accommodate for bigger detector systems such as [[http://www.nscl.msu.edu/tech/devices/hira/|HiRA]]. This chamber retains a target mechanism similar to the one described above (vertical translation + rotation), but with the additional possibility of shifting the target position along the beam axis. This feature is necessary for experiments that require more space "downstream" of the target to detect particles at forward angles. Note, that moving the target "upstream" of the nominal position reduces the solid angle of the spectrograph and requires a retune of the last two quadrupole triplets of the analysis line. | A much larger scattering chamber is available to accommodate for bigger detector systems such as [[http://www.nscl.msu.edu/tech/devices/hira/|HiRA]]. This chamber retains a target mechanism similar to the one described above (vertical translation + rotation), but with the additional possibility of shifting the target position along the beam axis. This feature is necessary for experiments that require more space "downstream" of the target to detect particles at forward angles. Note, that moving the target "upstream" of the nominal position reduces the solid angle of the spectrograph and requires a retune of the last two quadrupole triplets of the analysis line. |
