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: Electronics and data acquisition : tac01_submit : Hodoscope

Installation plan of the spectrometer system

The spectrometer system has been designed to be installed either in Hall A or Hall C according to their availability. The height of the spectrometer system was decided to fit the Hall A beam line height(13"), which is lower that of Hall C(10").

In Fig. 6, a plan view of the spectrometer system installed in Hall C is shown as an example. It is located between the HMS-SOS pivot and the G0 detector system. The spectrometer system will be installed as upstream as possible so that the interference with the G0 experimental setup is minimum.

In the case of installation in Hall A, the space available upstream of the Hall A target position possibly accommodate the whole spectrometer system.

Although E89-009 used a small beam dump specially installed in Hall C, it is necessary in E01-011 to use the beam dump of the hall, since the high beam intensity of 30 $\mu $A is required in contrast to E89-009, which used a low beam current of about 1 $\mu $A.. A set of two beam swingers are to be installed downstream of the splitter magnet in order to direct the beam to the beam dump.

The HKS magnets is under construction and they will be shipped to Jlab after testing the performance and measuring field maps at the manufacturer's factory. They are then disassembled to pieces of which weight is less than 20 US-tons to make transportation to Jlab and assembly at Jlab easy. They will be first installed and assembled in the Test Lab of Jlab before the installation to the experimental Hall. The fiducialization and confirmation of the field map will be carried out there. The splitter magnet and the Enge spectrometer will be installed in the Hall together with the HKS magnets. Each detector is fabricated and tested by a collaborating institution responsible for it. After the completion of each detector, it will be also shipped to Jlab and mounted on the support system.


next up previous
: Electronics and data acquisition : tac01_submit : Hodoscope
Satoshi N. Nakamura 平成16年12月2日