CEC Abstracts in PDF format (as of 7/3/07) - CEC-ICMC 2013

CEC 2007 - Abstracts
C1-O-06 Ball Aerospace Hybrid Space Cryocoolers
W. Gully, D.S. Glaister, P. Hendershott, V. Kotsubo,
E.D. Marquardt, Ball Aerospace & Technologies
Corp..
This paper describes the design, development, testing and
performance at Ball Aerospace of a long life, hybrid (combination of
Stirling and Joule-Thomson thermodynamic cycles) space
cryocoolers. Hybrid coolers are synergistic combination of two
thermodynamic cycles which combines advantages of each cycle to
yield overall improved performance. Hybrid cooler performance
advantages include: 1) load leveling of large heat loads, 2) remote
cryogenic cooling with very low to negligible induced vibration and
jitter, 3) very low redundant (off state) cooler penalties, 4) high power
efficiency, especially at low temperatures, and 5) simplified system
integration with capability to cross gimbals and no need for thermal
straps or switches. Ball is currently developing hybrid coolers on
several programs. The 35 K hybrid cooler provides 2.0 W at 35 K and
8.5 W at 85 K with an emphasis on load leveling of high transient heat
loads and remote, low vibration cooling. The 10 K hybrid cooler
provides 200 mW at 10 K, 700mW at 15 K, and 10.7 W at 85 K with
an emphasis on power efficiency. In addition, Ball built and tested a
complete hybrid cooler that met the requirements of the JWST Mid-
Infrared Instrument (MIRI) cooler including providing 80 mW at 6 K
and 100 mW at 18 K.
C1-O-07 Flight Qualified High Capacity Pulse Tube
Cooler
C. Jacob, T. Nguyen, J. Raab, Northrop Grumman
Space Technology.
The High Capacity Cryocooler Flight Qualified Cryocooler (HCC
Qual) is designed to provide large capacity cooling at 35K (2.3 Watts)
and 85 K (14.3 Watts) for space applications which require cold focal
planes and optics cooling. The HCC Qual is built upon the heritage of
the High Capacity Cryocooler (HCC) with a coaxial cold head
configuration. The coaxial configuration minimizes the cooler
parasitic and offers superior cooler integration. Flight qualification of
this cryocooler includes thermal performance mapping over a range of
reject temperatures, launch vibration testing and thermal cycling
testing. Acceptance test data will be presented.
C1-O-08 Raytheon Dual-Use Cryocooler Progress
R.C. Hon, C.S. Kirkconnell, Raytheon Space and
Airborne Systems.
Raytheon initiated development of the Dual-Use Cryocooler (DUC) as
a way of bridging the gap between tactical and space cryocooler
systems. The goal of the program is to produce a cryocooler system
with 80% of the typical space system functionality at less than 20% of
the typical cost. A single-stage pulse tube configuration was selected
due to its inherently low complexity. The compressor module is a
dual-opposed, self balanced design, making use of a flexure
suspension and clearance gap scheme for long operational life. The
drive electronics is based on a robust tactical design, modified for
additional functionality and hardened against radiation typical of the
space environment.
Development of the DUC system has progressed substantially over
the past two years, including the design, build and testing of a
brassboard thermo-mechanical unit (TMU). Demonstrated design
simplification features and initial test results are presented.
Significant progress was also made in terms of electronics
development. Existing tactical assets were modified for use with the
DUC, including the addition of separate drive circuits for each
compressor motor. The software was modified to enable features not
found in typical tactical systems such as first-order active vibration
cancellation. The brassboard electronics test results are also
presented.
C1-P Large Scale Refrigerators and
Liquefiers - II
C1-P-01 Large scale helium liquefaction and
considerations for site services for a plant located in
Algeria
P. Froehlich, J.J. Clausen, Linde Kryotechnik AG.
The large scale liquefaction of helium extracted from natural gas is
depicted. Based on a block diagram the chain, starting with the
pipeline downstream of the natural gas plant to the final storage of
liquid helium is explained. Information will be provided about the
recent experiences during installation and start-up of a bulk helium
liquefaction plant located in Skikda, Algeria, including part load
operation based on a reduced feed gas supply.
The local working and ambient conditions are described including
challenging logistic problems like shipping and receiving of parts,
qualified and semi-qualified subcontractors, basic provisions and tools
at site, and precautions to sea water and ambient conditions.
Finally the differences in commissioning (technically and evaluation
of time and work packages) to a European location and standards will
be discussed.
C1-P-02 Status of the refrigeration plant for the
Electrostatic
Cryogenic Storage Ring (CSR) at MPI-K in Heidelberg
R. von Hahn, J. R. Crespo Lopez-Urrutia, H. Fadil,
M. Grieser, K.-U. Kühnel, M. Lange, D. A. Orlov, R.
Repnow, T. Sieber, D. Schwalm, J. Ullrich, A. Wolf,
Max-Planck-Institute for Nuclear Physics; H. Quack,
Ch. Haberstroh, Technische Universität Dresden; D.
Zajfman, Weizmann Institute of Science.
At the Max-Planck-Institute for Nuclear Physics in Heidelberg a nextgeneration
electrostatic storage ring for atomic and molecular ion
beams is under construction. In contrast to existing electrostatic
storage rings our Cryogenic Storage Ring CSR will be cooled down to
temperatures below 2 K. The low-temperature of the vacuum
enclosure and all ion optical components decisively reduces the
influence of the black-body radiation incident onto the stored particles
such that only the lowest rotational levels of radiatively active
molecular ions will be occupied. Moreover, due to the excellent
vacuum of up to 10E-15 mbar highly charged (radioactive) ions or
antiprotons can be stored with sufficient life times. A concept for the
cooling of the storage ring has been developed and will soon be tested
at a prototype with a length of 1/10 of the ring. A commercial
refrigerator has been largely set up and is now in the commissioning
phase. In this paper the refrigeration plant and first results of the testoperation
will be presented.
C1-P-03 The CERN LHC Refrigeration System
P. Dauguet, G.M. Gistau-Baguer, P. Briend, B.
Hilbert, E. Monneret, J.C. Villard, G. Marot, F.
Delcayre, C. Mantileri, F. Hamber, J.C. Courty, P.
Hirel, A. Cohu, H. Moussavi, Air Liquide.
The LHC is the largest particle accelerator in the world. It is a
superconducting machine over 27 kilometers. Its magnets and cavities
require helium refrigeration and liquefaction in the temperature range
1.8 K to 300 K. This is the largest cryogenic system in the world
regarding the needed cryogenic power : 144 kW equivalent power at
4.5 K.
The LHC cryogenic system is composed of 8 x 18 kW at 4.5 K
refrigerators, 8 x 2.4 kW at 1.8 K refrigerators, 5 main valve boxes,
more than 27 km of helium tranfer lines and around 300 service
modules connecting the tranfer line to the magnet and cavity strings.
Most of these components have been designed, manufactured,
installed and started up by Air Liquide. Du to the huge size of the
project, the engineering, construction and commissionning of the
equipments have lasted for 8 years, from first order of equipments in
1998 to last commissionning in 2006. Specifications, architecture and
design of the major components of the LHC Refrigeration System will
be presented in the present paper.
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