Speaker
Description
Proton Improvement Plant – II (PIP-II) has been planned at Fermilab for providing powerful, high-intensity proton beams to the laboratory’s experiments. The heart of PIP-II is an 800 MeV Superconducting (SC) linear accelerator (Linac), which will provide 1.2 MW proton beam needed for the Long-Baseline Neutrino Facility (LBNF). The SC Linac accelerates the beam from 2.1 MeV to 0.8 GeV and includes five types of SC cavities to cover the entire velocity range required for acceleration of protons. These cavities are Half wave resonator (HWR), Single-spoke resonator (SSR1 and SSR2), Low Beta and High Beta Elliptic 5 – cell cavities (LB650 and HB650) [1]. The PIP-II cryogenic system consists of a Superfluid Helium Cryogenic Plant (SHCP) and the Cryogenic Distribution System (CDS) to the aforementioned SC cavities. The work described in the present article lists out the static and dynamic heat loads for each SC cavity along with the static heat load of the CDS. From the total computed heat load and pressure drop values in the CDS, the basic specifications for the SHCP, required for cooling the SC Linac, have evolved. The mitigation strategies for the heat load along with cryogen delivery to the cryomodules, are discussed in the article. Project specific requirements for the SHCP are also laid out.
Reference:
[1] The PIP-II Conceptual Design Report (Draft), V 1.00, November 29, 2016, available at: http://pxie.fnal.gov/PIP-II_CDR/PIP-II_CDR_v.0._work7.pdf