Final Commissioning of the Superconducting Heavy Ion Linear Accelerator at IUAC, Delhi

Tripti Sekhar Datta, Anup Choudhury, Jacob Chacko, Soumen Kar, Joby Antony, Suresh Babu, Manoj Kumar, D.S. Mathuria, Santosh Sahu, Dinakar Kanjilal
2015 Physics Procedia  
The superconducting linac as a booster of the 15UD Pelletron accelerator was partly commissioned with one linac module housing eight quarter wave bulk niobium cavities along with the superbuncher and rebuncher cryomodules. Subsequently two more linac cryomodules were added to have in total 24 cavities for acceleration. In addition, a new Linde helium refrigerator of capacity 750 W @ 4.2 K was installed in parallel to the earlier CCI refrigerator. The new refrigerator was integrated with the
more » ... ier cryogenics network system through a specially designed liquid helium distribution line without any valve box. The cooling philosophy with this new system is modified to have a faster cool down rate in the critical zone (150 -70 K) to avoid Q disease. The helium gas pressure fluctuation in the cavities is reduced significantly to have stable RF locking. The full linac is being operated and beams with higher energy are being delivered to the users. The present paper will highlight the performance of the new cryogenic system with respect to cool down rate, and helium pressure fluctuation.
doi:10.1016/j.phpro.2015.06.136 fatcat:5m5puk4edbemhoprvn4rwwerru