A set-up for installing DCCT Core in Indus-2 ring
A mechanical set-up has been designed and fabricated for installing DCCT torroid, procured from a commercial vendor, in Indus-2 ring, for measuring the stored current. Many design considerations and special features are required for safe and reliable functioning of DCCT sensor.
The DCCT torroid is mounted outside of a stainless steel vacuum chamber. In order to interrupt the electrical conductivity in the vicinity of vacuum chamber, a ceramic break is provided, so that wall current and any other unwanted circulating currents are not seen by the core which otherwise may cause error in the output. To protect the sensor from being heated beyond 800 C during vacuum chamber bake-out, a thermal shield is provided between sensor and chamber. For reducing the external magnetic field affecting the sensor , a two layer magnetic shield comprising of low carbon steel and mu-metal is provided. A copper shield is firmly placed around the DCCT core and ceramic break, for bypassing the low frequency component of wall current which otherwises passes through the sensor hole. The photograph shows DCCT core (without magnetic shields and copper bypass) installed in Indus-2 ring.
|
