FERMILAB CRYOGENIC STATUS

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FERMILAB CRYOGENIC STATUS Beams Division
Cryogenics Barry Norris (overseer) Alex Martinez
(helium cryo) Christine Darve (absorber/hydrogen
details) Arkadiy Klebaner (cycle
review) Particle Physics Division Del Allspach
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• Work in Progress
• Layout and Design of Civil Construction Cryo
  Hall and Experimenter Hall
• (Martinez and Norris)
• Design of Helium Cryogenic Facility (approx 500
  watts at 4.5 K OR 14K)
• (Martinez and Norris with Klebaner oversight)
• Absorber Cryostat Design
• (Darve, et. Al.
• Controls and Instrumentation for Cryogenic Batch
  Process and Safety
• (Pei, Norris, and Allspach)
• Safety Interfacing with Del Allspach

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Work NOT Charged To Us (or Not Being Worked On By
Us)

• Not presently working on Japanese convective
  needs with regard to the Linac Cryo Facility
• Not working on any detail of MICE

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Todays Talk

• Introduction to Work Norris
• Outline of Present Helium/Hydrogen Facility
  Martinez
• Details Regarding Hydrogen Absorber - Darve
• Introduction to Cryogenic Controls Needs -
  Norris

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Review of Quadlog Safety PLC Basics

• What is QUADLOG? It is the safety PLC design for
  potentially dangerous applications.
•  
• Such as
• Emergency shutdown systems
• Gas detection systems
• Fire detection systems
• Burner management systems
• IMPT POINT USED EXTENSIVELY AT CDF
•  

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CRYOGENICCONTROLS IDEA

• THERE WILL BE TWO (2) CONTROL PACKAGES USED IN
  THIS FACILITES FOR CRYOGENIC PURPOSES
• Standard Tevatron Process Control Package
• VME Based, POWER PC
• All helium I/O resides here, that is compressor
  and refrigerator systems
• Any non-critical Hydrogen affiliated I/O may
  potentially reside here
• 2) Specialized Safety PLC
• Used for Hydrogen I/O, FiRUS, ODH, flammable gas

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  QUADLOG has built-in features provide maximum
safety and reliability.   QUADLOG exceeds the
safety of triple modular redundant (TMR) system
with greater system reliability and extensive
diagnostics.   QUADLOG also incorporates
continuous PID control, analog I/O, open
communications, and a variety of operator
interface options not typically available from a
PLC.
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QUADLOG SYSTEM FRONT OF MODULES
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QUADLOG Module                
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The QUADLOG critical control system offers  
Increased safety with proven fail-safe
characteristics and protected outputs   Higher
system availability with the fault tolerance of
quad redundancy, special self-testing software,
and unique common cause defense mechanisms  
Improved reliability with greater strength
against industrial stressors and isolation
between I/O subsystems   Decreased start-up
time and minimized downtime with online
diagnostics and detailed error reporting  
Easier integration with other control systems via
open communications
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QUADLOG CRITICAL SPECS
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LOCATION
DCS of Hydrogen Experimental Hall and Manifold
Room will be install in Helium Refrigeration
Building. (Explosion proof for Class I, Division
I, Group B)
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PROTECTED OUTPUT
    QUADLOG Protected Outputs ensure no single
component failure can prevent a mandatory trip.  
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Redundant control
If On-line diagnostics detect a failure in one
side of the system (including input, processor
and output), the other side will maintains
control automatically and system remains
available