Dynamic PID loop control

Conference · Wed Jun 01 00:00:00 EDT 2011

OSTI ID:1022777

Pei, L; Klebaner, A; Theilacker, J; Soyars, W; Martinez, A; Bossert, R; DeGraff, B; Darve, C

The Horizontal Test Stand (HTS) SRF Cavity and Cryomodule 1 (CM1) of eight 9-cell, 1.3GHz SRF cavities are operating at Fermilab. For the cryogenic control system, how to hold liquid level constant in the cryostat by regulation of its Joule-Thompson JT-valve is very important after cryostat cool down to 2.0 K. The 72-cell cryostat liquid level response generally takes a long time delay after regulating its JT-valve; therefore, typical PID control loop should result in some cryostat parameter oscillations. This paper presents a type of PID parameter self-optimal and Time-Delay control method used to reduce cryogenic system parameters oscillation.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1022777
• Report Number(s): FERMILAB-CONF-11-247-AD; TRN: US1104143
• Resource Relation: Conference: Presented at Cryogenic Engineering Conference and International Cryogenic Materials Conference CEC-ICMC 2011, Spokane, Washington, 13-17 June 2011
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
CAVITIES
CONTROL SYSTEMS
CRYOGENICS
CRYOSTATS
FERMILAB
OSCILLATIONS
REGULATIONS
TIME DELAY
Accelerators