cryogenics

Paper	Title	Other Keywords	Page
WEPSB038	LabView Control System of the Cryogenic Complex for the Kaon RF-Separator at IHEP	controls, kaon, vacuum, monitoring	257
	V. Alferov, A. I. Ageev, A. Bakay, V. Fedorchenko, A. Kholkin, V. Krendelev, A. Lutchev, D. Vasiliev IHEP Protvino, Protvino, Moscow Region
	A cryogenic complex has been built at IHEP to provide liquid helium and nitrogen for the RF-separator of kaons. About 500 analog parameters and 300 digital signals have to be measured, tens of commands generated, and 20 closed loops activated. On a lower level of the control system there are 90 home made equipment controllers, based on Analog Device and Atmel programmable devices. They provide data acquisition, calculation of operating parameters, and generation of digital and 4-20 mA analog commands. Equipment controllers are connected to four personal computers (PC) by means of CAN field buses. The PCs in turn are connected by a dedicated Ethernet network. LabVIEW based software for control and monitoring of the cryogenic complex has been designed and developed. The paper describes the features and present status of the control electronics, firmware and software.
WEPSB040	Software Service for Cryogenic Data Representation and Analysis	controls, vacuum, site, radio-frequency	263
	I. Lobov, A. Lutchev, M. N. Stolyarov, S. A. Sukhov IHEP Protvino, Protvino, Moscow Region
	The Cryogenic and Vacuum System for OKA experimental complex requires reliable, fast and convenient program facilities for cryogenic data analysis – temperatures of cryogenic components, liquid helium levels, helium mass flow rates. The appropriate software service has been build on the base of common solution using MS SQL-server for historical data manipulation and IHEP Zerver for online data representation. Accordingly two computers are used to store and maintain cryogenic data which gives users two ways of data displaying. The archive view software (graphs, tables, correlation analysis) has been build with help of NI Developer Suit Core. The mimic panels software uses to display the live data. The mimic panels could be viewed through web-interface using Java applets, this is original software written in IHEP.
THCHC01	Development and Production of Superconducting and Cryogenic Equipment and Systems for Accelerators by IHEP	dipole, quadrupole, electron, vacuum	295
	S. Kozub, A. I. Ageev, I. Bogdanov, E. Kashtanov, A. P. Orlov, V. A. Pokrovsky, P. A. Shcherbakov, L. S. Shirshov, I. Slabodchikov, V. Sytnik, L. Tkachenko, S. Zinchenko, V. Zubko IHEP Protvino, Protvino, Moscow Region
	Superconducting and cryogenic programs at IHEP were got a powerful upsurge in the early eighties of the last century within the framework of the UNK project. More than hundred model superconducting magnets and the pilot batch of UNK superconducting dipoles and quadrupoles were produced and tested with the help of cryogenic test facilities built for this purpose. Cooperation with international scientific accelerator centers was developed in last ten years. Two superconducting magnetic systems of Electron Lens for the Tevatron accelerator (USA) were developed, manufactured and successfully brought into operation. 42 cryogenic electrical feed boxes of various types for Large Hadron Collider (Switzerland) were developed, produced and put into commission. Results of the development of fast-cycling superconducting magnets for the FAIR project (European Research Centre of Ions and Antiprotons, Germany) are discussed. Description of the largest in Russia cryogenic system for cooling with superfluid helium of superconducting RF separator for the new beam channel of the U-70 accelerator (Russia) is presented.
	Slides
THCHC03	Cooling System of the SIS300 Accelerator	dipole, quadrupole, multipole, superconducting-magnet	303
	S. Zinchenko, A. I. Ageev, S. Kozub, V. Zubko IHEP Protvino, Protvino, Moscow Region
	The Facility for Antiprotons and Ion Research (FAIR) being under construction in Germany as an international project is a cascade of accelerators; two last accelerators from this cascade will be made with the use of superconducting magnets. The large volume of the executed work on the SIS300 superconductive equipment allowed to start the estimation of the basic parameters of SIS300 cooling system. On the base of many research notes and calculations the item-by-item heat load budget at the helium temperature level is composed. Cooling system flow diagram is proposed, the calculated single phase helium temperature profiles along the string of magnets are presented and discussed. Helium flow pressure drop along the string of magnets during cooling down is calculated on the basis of "temperature wave" model and cooling down time of the accelerator is estimated.
	Slides
THPSC006	Test Facility for SIS300 Cryomodules	quadrupole, vacuum, controls, superconducting-magnet	334
	A. Vlasov, A. I. Ageev, E. Kashtanov, А. Khartchenko, S. Kozub, S. Zinchenko IHEP Protvino, Protvino, Moscow Region
	Within the framework of participation in FAIR project IHEP develops the fast-cycling superconducting quadrupole and corrector magnets for SIS300 accelerator. These magnets in the specific combinations will be united into the so called cryomodules having common cryostat. The facility for testing these cryomodules in the forced flow cooling mode, where it is intended to carry out the complex of electrical, magnetic and thermophysical tests, is examined. The facility is based on the existing helium compression and purification equipment, helium refrigerator and research cryostats. A satellite refrigerator is added to the cryogenic system, which also works as the helium mass flow rate multiplier.
THPSC008	Superconducting Transformers for Study of High-Current Superconducting Cables	dipole, induction, superconducting-magnet, power-supply	340
	L. S. Shirshov, I. Bogdanov, E. Kashtanov, S. Kozub, P. A. Shcherbakov, I. Slabodchikov, L. Tkachenko, V. Zubko IHEP Protvino, Protvino, Moscow Region
	A facility for measurement of critical current and minimal quench energy of Rutherford-type superconducting cables for accelerator magnets is created. The sample current is energized by a superconducting transformer circuit using an inductive method, where the sample conductor is a part of the secondary circuit. Two superconducting transformers were built; one of them is a solenoid type coil. The transformer consists of two concentric solenoids; the secondary coil is placed inside the primary coil. External magnetic field up to 6.5 T is provided by a superconducting solenoid with the aperture diameter of 60 mm. The second superconducting transformer with race-track coils has been designed and taken into operation. Short-circuited sample, fixed on a special holder, is placed in the aperture of a superconducting dipole magnet such way that the plane of sample loop is perpendicular to direction of external magnetic field, which can reach up to 6 T. The critical current of the secondary superconducting coil is 18 kA. The equipment for measurements of characteristics superconducting cable versus magnetic field is described.