Accelerator Magnetic Field Measurement
Development and Manufacture of the Measure Equipment for Monitoring a Magnetic Field in Radiation Conditions on Accelerators
Tech Area / Field
- INS-MEA/Measuring Instruments/Instrumentation
8 Project completed
Senior Project Manager
Lapidus O V
Joint Institute of Nuclear Research, Russia, Moscow reg., Dubna
- University of Uppsala / Svedberg Laboratory, Sweden, Uppsala
Project summaryPresently the common performance requirements of the accelerator operation and its detectors were much increased. It has resulted in necessity of increase of precision of a magnetic field monitoring till 0.01% (of the range maximum) and development of instrumentation for monitoring a magnetic field in conditions of raised radiation (20-30 kGy or 2-3 Mrad for CMS, LHC, CERN) with long-term stability up to 0.1% (of the range maximum).
This project is a part of the Russia and Ukraine collaboration under the project STCU N 320: "Development of magnetic measuring devices and systems for using under radiation in charged particle accelerators, space crafts' orbits, nuclear power plants".
The purpose of our project is:
- Development of magnetic measuring devices for monitoring a magnetic field in radiation conditions (up to 3 Mrad).
The result of the project should be:
- Creation of magnetic measuring devices on the basis of selected of radiation hardness magnetic sensors (within the framework of the project STCU N 320).
The common engineering solution of the set tasks requires technologies, connected to development and creation of the weapon of a mass defeat and systems of its delivery.
In the project are used:
- Fundamental researches at SU "LP" (Ukraine) on development and manufacture of micro-miniature sensors of a magnetic field.
- Fundamental researches at SF1T (Switzerland) on development precision sensors of a magnetic field, made on original technology.
- Fundamental researches in the field of radiation resistance of semiconducting materials and radiation protection of sensors and instrumentation (share operation SC INK and CERN in 1994-95).
- Accelerator at JINR, EXCHARM spectrometer at IHEP.
- Experience of designing and manufacture of precision magnetometers at JINR.
The engineering solution set in the project of the task is subpided into the following milestones:
- Creation of a superconducting magnetic test rig (5 T).
- Research in fields from -5 up to +5 T of main parameters of magnetic field sensors, past selection on radiation resistance (up to 3 Mrad) within the framework of the project STCU N 320.
- Creation of magnetic measuring devices on the basis of selected sensors of a magnetic field.
- Full scale test of instrumentation in radiation conditions on the accelerator at JINR, on EXCHARM spectrometer at IHEP and on the superconducting test solenoid at CERN.
- Research in fields from -5 up to +5 T of main parameters of magnetic sensors, made on Ukraine (Lvov), in Russia (S-Petersburg) and in Switzerland (Lausanne) and past selection on radiation resistance (up to 3 Mrad) within the framework of the project STCU N 320.
- The creation of instrumentation for measurement inhomogeneous impulse and constants of magnetic fields from -5 up to +5 T with precision is not worse than 0.01% at long-term instability 0.01%.
- Creation of a superconducting test rig (up to 5 T).
- For monitoring a magnetic field on accelerators and detectors. The prototypes of the given equipment were made and successfully work at LNP JINR, at LNR JINR, at LNPI (Gatchinas), at IHEP (Protvino), at INP (Rzez, Czechia).
There are the orders for manufacture of the developed equipment:
- Creation of a magnetic test rig for learning parameters of various materials HTSC (high-temperature superconductivity) at SU "LP". Contact to the customer: LA.Bolshakova, Ph.D., leader of laboratory, SU "LP", ph.- (0322)721632, fax-38(0322)744300.
- Creation of instrumentation for calibration and monitoring of a magnetic field on the accelerator at LNP JINR. Contact to the customer: V.V.Zhuravlev, deputy of department leader LNP JINR, ph.- (096) 21 65070.
Potential role of foreign collaborators
At Swiss Federal Institute of Technology together with the SENTRON corporation (Lausanne, Switzerland) within the framework of priority R&D program MINAST (Micro- and Nano-Systems Technology) are developed highly sensitive (500 mcV/mT) sensors of a magnetic field with long-term instability of sensitivity less than 0.01% in a year. Sensors will be tested at JINR in magnetic fields up to 5 T after their irradiation. Then we (JINR and SFIT) will suppose to construct of devices for monitoring of magnetic fields up to 5 T with precision is not worse than 0.01% at long-term instability 0.01% in a year.
Long-term rig-testing of instrumentation should pass on the accelerator at JINR, on the EXCHARM spectrometer at IHEP and on a superconducting test magnet at CERN.