Installation of the correction coils

Assembly of the MPD solenoid continues despite the objective difficulties.

Unfortunately, at present, our cooperation with manufacturer ASG Superconductors has been suspended. Nevertheless, on July 19, 2022, we completed another stage of work, according to a plan for preparing the solenoid for obtaining the magnetic field. We equipped the poles of the magnetic circuit with the correction coils TRIM 1 and TRIM 2. The precise installation of the coils into the magnetic circuit, along with the installation of the solenoid into the magnetic circuit, is an important part for obtaining a uniform magnetic field. After the coils were installed into the pole, their adjustment was carried out. The deviation of the coil-pole alignment for TRIM 2 and TRIM 1 was 0.47 and 1.29 mm, respectively. This fully fits into a tolerance of 2 mm.

In addition, on that day, we received a carbon fiber frame and placed it in the MPD hall. This frame is installed into the solenoid, and detectors will be installed inside it.

Also, we continue the assembly of the cryogenic unit connecting the solenoid to the control Dewar, which is a part of the cryogenic cooling system of the solenoid. The unit has successfully passed leak tests.

In August 2022, we plan to assemble the magnetic circuit and install the upper platform, and from September we will start the placement and assembly of the equipment of the vacuum and cryogenic solenoid system.