The Q1, Q2 and D magnets are installed on a common base. The magnets and the common base were constructed at Mitsubishi Electronic Co. (figure 27) and used for the D magnet assembly. The height of the HKS magnet system from the common base (1250 mm height) is 2500 mm and it will be placed on four legs prepared by Jlab (figure 29). The height of the central plane of the HKS magnets from the Jlab legs is 2530 mm; it is designed so that the spectrometer system can be installed either in Hall C or Hall A where the beam heights are 3962.4 mm (13') and 3048.0 mm (10'), respectively. The spectrometer position could be adjusted by pushing bolts and small-friction sheets (Oiless) in the horizontal plane. The height could be adjustable by hydraulic jacks (stroke 30 mm) with swivels placed between the common platform and Jlab legs.
The Q1 and Q2 magnets are placed on a girder stuck from the common base which support the D magnet. The center of mass is not expected to shift much by this connection because the D magnet is much heavier than Q1 and Q2.