Keyword: dipole
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MOZMH03 Search for the Charged Particle Electric Dipole Moments in Storage Rings lattice, polarization, sextupole, storage-ring 6
 
  • V. Senichev
    FZJ, Jülich, Germany
 
  The idea of searching for the electric dipole moment (EDM) of proton and deuteron using polarized beams in a storage ring was originally proposed at Brookhaven National Laboratory (BNL), USA. Currently, the Jülich Electric Dipole moment Investigations (JEDI) collaboration develops the conceptual design of such a ring specifically for the search of the deuteron electrical dipole moment (dEDM). The idea is that the oscillation of the spin due to a possible finite electric dipole moment is separated from the influence of the magnetic dipole moment (MDM), and the spin behavior indicates the existence of dEDM. In connection with this problem, two questions arise: (i) how to create conditions for maximum growth of the total EDM signal of all particles in the beam bunch, and (ii) how to differentiate the EDM signal from the induced MDM signal. For the design of such a ring, we need to address three major challenges: - the ring lattice should meet the conditions of beam stability, and it has to have incorporated straight sections to accommodate the accelerating station, equipment for injection and extraction of the beam, a polarimeter, and sextupoles; - the polarization lifetime of the beam must be around ~1000 seconds; - systematic errors have to be minimized to eliminate the induced fake EDM signal. In my contribution, I will present the current status of the project.  
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WECAMH03 Analysis of the Particle Dynamics Stability in the Penning-Malmberg-Surko Trap cyclotron, scattering, experiment, plasma 64
 
  • I.N. Meshkov
    JINR, Dubna, Moscow Region, Russia
  • M.K. Eseev
    NAFU, Arkhangelsk, Russia
  • I.N. Meshkov, A.D. Ovsyannikov, D.A. Ovsyannikov, V.A. Ponomarev
    Saint Petersburg State University, Saint Petersburg, Russia
 
  Present report refers to the problem of the study of charged particle dynamics in the Penning-Malmberg-Surko trap. Various models of particle dynamics describing the magnetron and cyclotron motions are considered. Representation of the solutions in the form of a series is used for the magnetron motion. The problems of the stability of the magnetron motion are investigated.  
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THZMH01 SC and HTS-related Activity at IHEP quadrupole, solenoid, electron, superconductivity 128
 
  • S. Kozub, A.I. Ageev, I. Bogdanov, E. Kashtanov, V.A. Pokrovsky, P.A. Shcherbakov, L.S. Shirshov, V.I. Shuvalov, I. Slabodchikov, V. Sytnik, L. Tkachenko, O.V. Trusov, S. Zinchenko
    IHEP, Moscow Region, Russia
 
  The SC program at IHEP of NRC “Kurchatov Institute” has been developed intensively in the 1980ies in the framework of the UNK project. More than a hundred of models of the SC magnets of various designs, and then the pilot batch consisting of 25 full-scale dipoles and 4 quadrupoles have been designed, manufactured and tested at IHEP. Two SC magnetic systems of Electron Lens for the Tevatron collider were developed, manufactured, shipped and successfully brought into operation. Development of fast-cycling SC magnets for the FAIR project is discussed. Racetrack coils from HTS-2G tape for electrical machines that were developed, manufactured and tested are reported. Test and trial results with HTS dipole magnets employing Bi2223 as well as second-generation HTS are also reviewed.  
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THCDMH01 Conceptual Design of Superconducting Combined-Function Magnets for the Next Generation of Beam Cancer Therapy Gantry proton, quadrupole, sextupole, superconducting-magnet 138
 
  • S.T. Sanfilippo, A. Anghel, C. Calzolaio, A. Gerbershagen, J.M. Schippers
    PSI, Villigen PSI, Switzerland
 
  An increasing number of proton therapy facilities are being planned and built at hospital based centers. Many facilities use rotatable gantry beamlines to direct the proton or ion-beam at the patient from different angles. A key issue is the need to make future gantries lighter and more compact with the use of cryogen-free superconducting magnets, in particular for the final bending section which can be of large aperture. Benefits of using the superconducting technology are: (1) the possibility to have a large momentum acceptance, hence reducing the need to ramp the magnet and enabling new treatment techniques, (2) the size reduction due to a lower bend radius and (3) the weight reduction up to a factor ten. The latter will also significantly reduce the costs of the supporting structure. We present a conceptual design based on Nb3Sn superconducting combined function magnets (dipole, quadrupole, sextupole). The geometry using racetracks, the superconducting strand and cable parameters and the results of the thermal and the mechanical studies are reported. These magnets will work at a temperature of about 4.2 K cooled with cryocoolers.  
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THCDMH03 The Progress on Manufacturing and Testing of the SC Magnets for the NICA Booster Synchrotron booster, superconducting-magnet, collider, synchrotron 144
 
  • H.G. Khodzhibagiyan, N.N. Agapov, P.G. Akishin, V.V. Borisov, A.V. Bychkov, A.M. Donyagin, A.R. Galimov, O. Golubitsky, V. Karpinsky, B.Yu. Kondratiev, S.A. Korovkin, S.A. Kostromin, A.V. Kudashkin, G.L. Kuznetsov, D.N. Nikiforov, A.V. Shemchuk, S.A. Smirnov, A.Y. Starikov, G.V. Trubnikov
    JINR, Dubna, Moscow Region, Russia
 
  NICA is a new accelerator collider complex under construction at the Joint Institute for Nuclear Research in Dubna. The facility is aimed at providing collider experiments with heavy ions up to Gold in the center of mass energy from 4 to 11 GeV/u and an average luminosity up to 1*1027 cm-2 s−1 for Au79+. The collisions of polarized deuterons are also foreseen. The facility includes two injector chains, a new superconducting booster synchrotron, the existing 6 AGeV superconducting synchrotron Nuclotron, and a new superconducting collider consisting of two rings, each 503 m in circumference. The booster synchrotron is based on an iron-dominated "window frame"- type magnet with a hollow superconductor winding analogous to the Nuclotron magnet. The design of superconducting magnets for the NICA booster synchrotron is described. The progress of work on the manufacturing and testing of the magnets is discussed. The calculated and measured values of the characteristics of the magnets are presented. The status of the facility for serial test of superconducting magnets for the NICA and FAIR projects is described.  
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FRCAMH05 Booster Synchrotron at NICA Accelerator Complex booster, kicker, ion, injection 160
 
  • A. Tuzikov, O.I. Brovko, A.V. Butenko, A.V. Eliseev, A.A. Fateev, V. Karpinsky, H.G. Khodzhibagiyan, S.A. Kostromin, I.N. Meshkov, V.A. Mikhaylov, A.O. Sidorin, A.I. Sidorov, A.V. Smirnov, E. Syresin, G.V. Trubnikov, V. Volkov
    JINR, Dubna, Moscow Region, Russia
  • O. Anchugov, V.A. Kiselev, D.A. Shvedov, A.N. Zhuravlev
    BINP SB RAS, Novosibirsk, Russia
 
  NICA is the new complex being constructed on the JINR aimed to provide collider experiments with ions up to aurum at energy of 4.5x4.5 GeV/u. The NICA layout includes 600 MeV/u Booster synchrotron as a part of the injection chain of the NICA Collider. The main goals of the Booster are the following: accumulation of 4E109 Au31+ ions; acceleration of the heavy ions up to energy required for effective stripping; forming of the required beam emittance with electron cooling system. The layout makes it possible to place the Booster having 210.96 m circumference and four fold symmetry lattice inside the yoke of the former Synchrophasotron. The features of the Booster, its main systems, their parameters and current status are presented in this paper.  
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FRCAMH07 NICA Collider Lattice Optimization collider, quadrupole, ion, lattice 166
 
  • O.S. Kozlov, A.V. Butenko, H.G. Khodzhibagiyan, S.A. Kostromin, I.N. Meshkov, A.O. Sidorin, E. Syresin, G.V. Trubnikov
    JINR, Dubna, Moscow Region, Russia
 
  The Nuclotron-based Ion Collider fAcility (NICA) - accelerator complex is being constructed at JINR. It is aimed to the collider experiments with ions and protons and has to provide the ion-ion (Au+79) and ion-proton collision in the energy range of 1-4.5 GeV/amu and also polarized proton-proton and deuteron-deuteron collisions. Each of two collider ring has a racetrack shape with two bending arcs and two long straight sections. Beams are separated in vertical plane and come into collisions in two IPs. Dynamic aperture of the NICA collider has been studied for different parameters of the optics at IP. Effects of the fringe fields of structural elements are considered in the optimization of the collider lattice.  
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TUPSA001 Commissioning of e+/e Transfer Line from BINP Injection Complex to VEPP-2000 Facility controls, injection, collider, positron 213
 
  • I.M. Zemlyansky, Yu. Aktershev, V.V. Anashin, A.V. Andrianov, A.M. Batrakov, O.V. Belikov, D.E. Berkaev, M.F. Blinov, B.A. Dovzhenko, F.A. Emanov, V.V. Gambaryan, V.A. Kiselev, I. Koop, A.A. Krasnov, I.A. Mikheev, D.A. Nikiforov, A.V. Otboev, A.V. Pavlenko, V.P. Prosvetov, V.V. Rashchenko, Yu. A. Rogovsky, A.V. Semenov, P.Yu. Shatunov, Y.M. Shatunov, D.B. Shwartz, A.A. Starostenko, S.S. Vasichev, V.D. Yudin, Yu.M. Zharinov
    BINP SB RAS, Novosibirsk, Russia
  • A.A. Krasnov, A.V. Pavlenko, Yu. A. Rogovsky, D.B. Shwartz, A.A. Starostenko
    NSU, Novosibirsk, Russia
 
  Funding: The work is supported by the Ministry of Education and Science of the Russian Federation and by grant NSh-10088.2016.2.
Commissioning of e+/e transfer line from Injection Complex to VEPP-2000 facility is done in 2016. Both electrons and positrons beams are injected to VEPP-2000 collider. The channel layout, lattice functions, magnetic elements, beam diagnostic system, vacuum system and control system are presented in this article. The details of commissioning process are also mentioned.
 
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TUPSA046 Experimental Analysis of Dipole Modes in Elliptical Cavity cavity, simulation, experiment, impedance 313
 
  • Ya.V. Shashkov, M.V. Lalayan, N.P. Sobenin
    MEPhI, Moscow, Russia
  • A. Orlov
    NRNU, Moscow, Russia
 
  The experimental measurements of transverse shunt impedance for higher order modes TM110 and TE111 for S-band elliptical cavity were carried out. The experiments using dielectric and metallic spheres as perturbing objects and with ring probe were done.  
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WEPSB002 First Experimental Demonstration of the Extraction of Low Energy Beams from the ESR to the CRYRING@ESR extraction, ion, septum, experiment 351
 
  • S.A. Litvinov, Z. Andelkovic, D. Beck, A. Bräuning-Demian, S. Fedotova, W. Geithner, F. Herfurth, R. Hess, C.M. Kleffner, I. Kraus, M. Lestinsky, F. Nolden, M. Steck, G. Vorobyev
    GSI, Darmstadt, Germany
 
  The CRYRING@ESR facility will provide the unique possibility for studying properties of highly charged cooled stable and short-lived ions stored at low energy for atomic and nuclear research within the FAIR project. Heavy ion beams will be stored, cooled and decelerated to energies between 10 and 4 MeV/u in the ESR and then delivered to the CRYRING@ESR. There is no dedicated kicker magnet for the fast extraction in this direction. However, a specially developed distorted closed orbit of the beam stored in the ESR in combination with the injection kicker has been suggested for the extraction and experimentally verified in 2014. In the first experiment the ion beam was extracted and transported over a distance of 20 m towards the CRYRING@ESR. In the 2016 machine development run the heavy ion beam was successfully extracted from the ESR and delivered to the first fluorescent screen inside CRYRING@ESR for the first time. Detailed ion-optical simulations as well as the experimental results will be discussed.  
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WEPSB028 Computer Simulation of the Slow Beam Extraction From Nuclotron sextupole, extraction, resonance, lattice 422
 
  • A.D. Kovalenko, I.L. Avvakumova
    JINR/VBLHEP, Moscow, Russia
  • A.D. Kovalenko, V.A. Mikhaylov
    JINR, Dubna, Moscow Region, Russia
 
  The results of modelling of ion's motion during beam slow extraction from Nuclotron at the energy 6 GeV/Amu are shown in this work. Influence of sextupole field component of dipole magnets and fringe fields of Lambertson's magnets on the characteristics of extracted beam was analyzed. The calculations have been done via MadX.
* Issinsky I., Mikhaylov V., Shchepunov V. Nuclotron lattice. Proceedings of EPAC 1990, p.458.
** Kovalenko A. Nuclotron: status and future. Proceedings of EPAC 2000, p.554.
*** Agapov N. et al. Slow beam extraction from Nuclotron. Proceedings of the 2001 Particle Accelerator Conference, p.1646.
 
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WEPSB033 Focusing of Charged Particles by Magnetic Dipoles focusing, induction, quadrupole, betatron 431
 
  • G.V. Dolbilov
    JINR, Dubna, Moscow Region, Russia
 
  The possibility of using magnetic dipoles for tight focusing of charged particles is discussed. Plane-parallel geometry of the magnetic poles of the dipoles greatly simplifies lens design and reduces the cost of creating a focusing system. Focusing is performed using gradient pulses of force of the magnetic dipoles.  
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WEPSB049 Temperature Control System for Thermoradiotherapy Facilities simulation, controls, experiment, focusing 474
 
  • S.M. Polozov, A.M. Fadeev, S.M. Ivanov
    MEPhI, Moscow, Russia
  • E.A. Perelstein
    JINR, Dubna, Moscow Region, Russia
 
  It is known, hyperthermia is widely used to improve the efficiency of cancer treatment. Local hyperthermia is a method where only tumor is heated, on the other hand healthy tissues are protected from overheating. It was proposed to use an array of eight independently phased dipoles operating on 100-150 MHz to focus the RF energy in deep-situated volume of 30-50 mm size. But the problem of non-invasive temperature measurement should to be solved for correct operation of the local thermoradiotherapy systems. Conventional invasive thermometry devices as thermocouples, thermistors or Bragg optical sensors can not be widely used because of serious risk of the cancer cells transport to healthy tissues. Radiothermometry or acoustic thermometry can not be used for tissues located deeper than 5-7 cm. As known electrodynamics characteristics of tissues depend on temperature. It was proposed to use this effect for active radiothermometry in local hyperthermia. Two opposite RF dipoles can be used as generator and receiver of pick-up signal. It was shown by simulations that such method can be used for thermometry of deep-situated tissues and have high resolution. Results of simulation will present in report.  
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WEPSB050 Laboratory Model of Thermoradiotherapy Facility: Experimental Results experiment, controls, simulation, radiation 477
 
  • S.M. Polozov, A.M. Fadeev, S.M. Ivanov
    MEPhI, Moscow, Russia
  • E.A. Perelstein
    JINR, Dubna, Moscow Region, Russia
 
  Hyperthermia combined with radiotherapy (thermoradiotherapy) or with chemotherapy is one of promising approach to improve the cancer treatment efficiency. The treatment of deep-situated tumors is a problem which can not be solved by means of traditional facilities developed for whole-body or regional hyperthermia because of overheating of healthy tissues and blood. A cylindrical array of independently phased dipoles was proposed to focus electromagnetic energy in deep-situated tumors. It was early shown by simulations that array of eight independently phased dipoles operating on 100-150 MHz can be used to focus energy in an ellipsoid of 30-50 mm in size. Later the laboratory model of thermoradiotherapy facility was developed and constructed and series of experiments were carried out. Results of experiments and its comparison with simulations will discuss in report.  
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THPSC003 The Design of Permenant Magnet Spread System for 0.5 MeV Irradiation Accelerator electron, permanent-magnet, high-voltage, radiation 541
 
  • J. Huang, Q.S. Chen, K. Fan, M. Fan, W. Qi, Y.Q. Xiong, J. Yang, L.G. Zhang
    HUST, Wuhan, People's Republic of China
  • T. Yu, C. Zuo
    Huazhong University of Science and Technology, State Key Laboratory of Advanced Electromagnetic Engineering and Technology,, Hubei, People's Republic of China
 
  Funding: Supported by Natural Science Foundation (11505068)
The traditional electron beam scanning magnet has many disadvantages, for example, the regulatory of excitation current is very complex and the irradiation uniformity as well as the irradiation area is very difficult to improve and expand. Thus the author of the paper proposes an innovative technology of a permanent magnet spread system for 10 MeV irradiation accelerator which uses a special configuration of the magnetic field to spread electron beam bunch directly and would remarkably improve the spread uniformity, simplify the accelerator and would be helpful to protect the titanium window and expand the irradiation area. Also, the technology could as well be used on the electron beam irradiation of those irregular structured objects of large size.
 
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THPSC005 Magnetic Measurement System For the NICA Collider Dual Dipoles collider, booster, data-acquisition, power-supply 547
 
  • M.M. Shandov, V.V. Borisov, A.V. Bychkov, A.M. Donyagin, O. Golubitsky, H.G. Khodzhibagiyan, S.A. Kostromin, M.M. Omelyanenko
    JINR, Dubna, Russia
  • A.V. Shemchuk
    JINR/VBLHEP, Dubna, Moscow region, Russia
 
  NICA collider magnetic system consists of 80 dual dipole superconducting magnets. Measurement of magnetic field parameters is assumed for each collider magnets. This paper describes magnetic measurements methods and developing of magnetic measurements system.  
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THPSC008 Magnetic Systems for Beam Transport at Extraction Channels of ILU Accelerators electron, extraction, focusing, radiation 556
 
  • V.V. Bezuglov, A.A. Bryazgin, B.L. Faktorovich, E.N. Kokin, V.E. Nekhaev, A.D. Panfilov, V.M. Radchenko, E.A. Shtarklev, V.O. Tkachenko, A. YU. Vlasov, L.A. Voronin
    BINP SB RAS, Novosibirsk, Russia
 
  This paper is devoted to magnetic systems for beam transport at extraction channels of electron industrial accelerators of the ILU type. The extraction systems meant for energy of the accelerated electrons up to 10 MeV and beam power up to 100 kW are described. The analysis of their work subject to the processes connected with the induced eddy currents in metal walls of beam scanning chambers is made; special attention is paid to forming of the dose field in a radiation zone. In paper the magnetic system for bending of the nonmonochromatic beams is offered to application. The essence of the described device consists in application of two identical magnetic mirrors in which distribution of magnetic field on depth is formed so that natural rise of magnetic field intensity on an entrance to a mirror is followed by decrease of this field under a certain law. In the issue of impact on charged particles of forces arising in cylindrical lenses of each mirror is possible to compensate angular divergence of strongly nonmonochromatic beams in gaps of magnetic mirrors and to receive after bending a beam with parameters close to phase characteristics of an input beam. The design procedure of such bending device and a general view of installation for experimental check of the offered bending system on electron beam are given in this paper.  
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THPSC012 First Experience of the HTS-II Dipole Type Magnets Development at NIIEFA operation, permanent-magnet, controls, cryogenics 563
 
  • I.Yu. Rodin, V.M. Amoskov, E.N. Andreev, A.A. Dyomina, V.A. Glukhih, V.P. Kukhtin, E.A. Lamzin, E.R. Zapretilina
    NIIEFA, St. Petersburg, Russia
  • V.A. Belyakov, S.E. Sytchevsky
    Saint Petersburg State University, Saint Petersburg, Russia
  • S.V. Samoilenkov
    JSC SuperOx, Moscow, Russia
 
  The possibility to design, manufacture and test the dipole type magnets from the second generation high-temperature superconductors (HTS-II like YBCO and ReBCO) was demonstrated at the Efremov Institute. The paper describes available computation techniques, design approaches and manufacturing equipment, which could be used to meet the modern requirements for the magnets of accelerators, research equipment, magnet levitation systems etc. The manufacturing equipment comprises the winding lines and insulating devices to provide different configurations and insulating schemes of coils. Additionally, an equipment to produce the Roebel-cable for high current applications was procured and put in operation. As an example, the results of development of the HTC-II dipole type magnets for the different kind dummies of maglev systems are presented. The ReBCO tapes produced by JSC "SuperOx" (Moscow) were used. Up to 0.5 T magnets cooled by liquid nitrogen were designed as a part of levitation system consists of permanent, HTS-II and normal conductive magnets. Comprehensive tests verified the computation results and demonstrated the readiness to develop HTS-II dipole magnets under the customer requirements.  
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THPSC043 Series Magnetic Measurements Of NICA Booster Dipoles booster, coupling, electron, quadrupole 629
 
  • V.V. Borisov, A.V. Bychkov, A.M. Donyagin, O. Golubitsky, H.G. Khodzhibagiyan, S.A. Kostromin, M.M. Omelyanenko, M.M. Shandov
    JINR, Dubna, Moscow Region, Russia
  • A.V. Shemchuk
    JINR/VBLHEP, Dubna, Moscow region, Russia
 
  NICA booster magnetic system consists of 40 dipole and 48 quadrupole superconducting (SC) magnets. Measurement of magnetic field parameters is assumed for each booster magnets. At the moment six series dipole magnets are assembled and have passed all tests. Booster dipole magnets are 2.14 m-long, 128 /65 mm (h/v) aperture magnets with design similar to Nuclotron dipole magnet but with curved (14.1 m radius) yoke. They will produce fields up to 1.8 T. The magnetic field parameters will be measured at "warm" (300 K) and "cold" (4.5 K) conditions. The obtained results of magnetic measurements of first five magnets are summarized here.  
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THPSC049 Dielectric Chart as a Tool for Diagnosis of Dielectric Materials diagnostics, impedance, operation, polarization 641
 
  • V.A. Klemeshev, A.G. Karpov
    St. Petersburg State University, St. Petersburg, Russia
 
  One of the most informative diagnostic methods dielectric materials is the analysis of the complex permittivity depending on the frequency of the electric field*. Dielectric chart is the dependence of the imaginary part of the complex permittivity of its real part. Thus, difference between the real dielectric chart from the reference or change it during the operation can be a means of diagnostics of dielectric materials. Dielectric chart in the classical theory of Debye is a semicircle with its center lying on the real axis. For solid dielectric the dielectric chart deviation from the semicircle can be quite large, but it still remains a circular arc. This deviation is characterized by parameter a (in the case of the Debye a=0). To clarify the physical meaning of the deviations of the experimental data on the Debye theory, expressed in the value of a, several possible causes have been considered: the effect hindered reorientation of dipoles, the effect of the non-sphericity of the molecules, the complex nature of viscosity. However, the main cause of deviations, in our opinion, is the availability of the distribution of relaxation times around a central relaxation time, in particular, due to defects in the sample. Gaussian distribution width increases rapidly with increasing a. In this paper we propose an algorithm for calculating a, allowing you to quickly determine the condition of the sample on a single parameter.
* Karpov A.G., Egorov N.V. An Automated dielectrometer. // Pribory i tehnika eksperimenta.- 1999.- 6.- P.63-67.
 
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