• P.Forck, A.Peters
  Gesellschaft fuer Schwerionenforschung GSI, Darmstadt, Germany

The planned FAIR facility consists of two heavy ion synchrotrons and four large storage rings. The super-conducting synchrotrons are build for high current operation and secondary ion production. A large variety of low current secondary beams is stored and cooled in the four storage rings. A complex operation scheme with multiple use of transport lines is foreseen. This demands an exceptional high dynamic range for the beam instrumentation. Due to the enormous beam power, non-destructive methods are mandatory for high currents. For the low current secondary beams, non-destructive diagnostics are preferred due to the low repetition rate. Precise measurements of all beam parameters and automatic steering or feedback capabilities are required due to the necessary exploitation of the full ring acceptances. Moreover, online beam-corrections with short response times are mandatory for the fast ramping super-conducting magnets. Due to the ultra-high vacuum condition and the demanding measurement accuracy, novel technical solution are foreseen. An overview of the challenges and projected innovative solutions for various diagnostic installations will be given
Transparencies

37

• P.V.Logachev, D.A.Malutin, A.A.Starostenko
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

The report is devoted to possible applications of low energy electron beam in diagnostics of intense beams. Experimental results of electron beam probe application in BINP are presented.
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40

• A.S.Gogolev, A.P.Potylitsyn
  Tomsk Polytechnic University, Tomsk, Russia

• A.M.Taratin
  JINR Russia

The accelerated beams extraction is one of the important problems of modern facilities, such as J-PARC or Tevatron. One of an efficient approach is the beam extraction with using bent crystal deflectors. The on-line control of the quality of crystal structure of deflector becomes necessary, when crystal deflector is used to extraction of intense proton or ion beams. For example, intensity of proton beam at accelerator J-PARC is ~ 3*10¹⁴ per spill. Investigation the possible radiation damage of usually used silicon deflectors is the open question for such beams. In this work, the monitoring of crystal deflectors quality based on registration of parametric x-ray radiation (PXR) is proposed. Proposed method gives a possibility to control a uniformity of deflector bending by measuring a PRX line width and allows to estimate a damage of deflector crystal structure under intense beam.
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43

• G.Naumenko, A.Potylitsyn, L.Sukhikh
  Nuclear Physics Institite, Tomsk, Russia

The requirement for the accelerator installations of the next generations such as linear collider, where a small beam size at the interaction point is required to achieve a reasonable luminosity, stimulated new techniques development for a non-invasive measuring an electron beam size as small as 10 mm. The development of the non-invasive bunch size diagnostics based on the optical diffraction radiation (ODR) is now in progress in frame of TPU-KEK-SLAC collaboration. The experimental test of a transverse beam size measurement was performed successful on the KEK-ATF extracted electron beam using the optical diffraction radiation from a flat conductive target with a slit. However many difficulties emerge if we going from the one GeV electron energy to the several tenth GeV electron beams. The extremely high Lorenz-factor value gives rise to the some problems, such as a catastrophic decreasing of the method sensitivity to the beam size, extremely pre-wave zone effect even in the optical range and so on. We discuss here the origins of these difficulties and suggest the ways of these problem solutions. To provide the necessary method sensitivity to the ~5mm beam size we suggested to use the ODR from a target, consisting on two crossed conductive semi-planes. In this geometry ODR splits into two beams with phase difference depending on an electron position. If we bring together these beams, the interference picture became depending on the transverse beam size. However in contrast to the flat slit target technique this method sensitivity does not depend on a Lorenz-factor and may be used for high-energy electrons. Also the same technique may be used as a non-invasive beam size monitor by choosing of target parameters. This method was developed and successful tested on the extracted KEK-ATF electron beam. This test showed the possibility of a single bunch micron beam size measurement. All of the preceding allows us to hope to create a tools for the non-invasive beam diagnostics of electron beam with Lorenz-factor higher than 60000.
Transparencies

46

• V.Kozak
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

Creating new installation and upgrading existing facilities require a great amount of control devices. There was designed a unified device set for new control systems. All devices implemented as embedded controllers for incorporating into controlled equipment like power supplies, RF-station and so on. First applications show a lot of advantages embedded controllers over classical modular devices. Now these devices are widely used in control systems both in BINP and in other scientific institutions. Here are presented the developed device set, described implementation and discussed typical applications.
Transparencies

49

• D.E.Berkaev, P.B.Cheblakov, V.R.Kozak, Yu.M.Shatunov, I.A.Koop, E.A.Kuper, A.P.Lysenko, V.V.Druzhinin, P.Yu.Shatunov, Yu.A.Rogovsky, A.N.Kyrpotin
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

Electron-positron collider VEPP-2000 is under commissioning at Budker Institute of Nuclear Physics. The paper presents architecture, implementation and functionality of the software of the collider control system. The software according to hardware system consists of interacting subsystems responding on different acceleration facility parts. Control system software is based on several TCP/IP connected PC platforms working under operating system Linux and uses client-server techniques. The paper describes implementation, operating possibilities and perspectives of VEPP-2000 software.

The paper also presents structure, architecture and implementation of the hardware of the collider control system. The system consists of pulse-elements, steering coils power supplies, high-current main field power supply, RF subsystems and some other special subsystems (such as vacuum, temperature, etc. control subsystems). The system is based on modern industrial protocol CAN-bus and specialized electronic BINP manufactured blocks according the standard. The paper describes implementation of different subsystems based on CANbus devices, and operating characteristics and possibilities.
Transparencies

52

• A.Batrakov, P.Vobly, S.Zverev, I.Ilyin, V.Kozak, E.Kuper, V.Mamkin V.Ovchar, G.Fatkin, V.Tsukanov, A.Volkov
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

In BINP for creation of measuring systems with Hall sensors CAMAC - electronics were used many years. This system had good parameters and successfully used for measurements of magnets produced in BINP as for installations of VEPP-family as for foreign facilities: LHC (CERN), SLS (Switzerland), BESSY (Germany), SAGA (Japan). Hardware deterioration and MS DOS application of previous system demanded to design a new electronics and modern software. The paper describes the new VME-based system and MS Windows application developed for replacement of old system. The system hardware consists of VME crate controller, VME - RS-232 interface, VME - CAN interface and three specialized units: Hall-Sensor analogue Interface (VMEHSI), precision ADC (VMEADC16) and Hall carriage Thermo Stabilizer (HTS), fabricated in Budker INP. Resolution of measuring devices is less than 1uV and stability is better than 10^-5. Software of the Hall-sensor measuring system consists of embedded part, which operates on VME-controller under the mcLinux operational system, and user's high-level software "WinHall", which is a MS Windows application with user-friendly graphical interface. The features of new system and practice results are reported.

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• G.V.Karpov, A.S.Medvedko, E.I.Shubin
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

A series of precise magnetometers on base of pulsed Nuclear Magnetic Resonance (NMR) techniques has been developed in BINP. In the range of 0.025÷13 T error of homogeneous magnetic fields measurements not exceeds (1÷2) ppm, resolution is better than 0.1 ppm. The magnetometers provide automatic search of NMR signal and tracking of the magnetic field. One type of the magnetometers is able to work with aluminum or copper powder as working substances of NMR probes. These probes can be used for measurements of magnetic fields at liquid helium temperature. A special NMR probe with very small sensitive volume (about 1 mm3) has been designed to measure of fields with the gradient up to 150 G/cm. At present NMR magnetometers developed and fabricated in BINP work successfully in some scientific centers in Russia and abroad. The features of the magnetometer's electronics design and more interesting examples of magnetometer's application in charged particle storage rings are presented.
Transparencies

58

• V.G.Barkova, A.V.Kiselev, V.J.Chudaev
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

The article presents rated data for analysis of efficiency of concrete shielding against slant penetration of bremsstrahlung of 5.0 MeV electrons with due account of the angle-energy distributions of radiation from targets. Initial angle-energy distributions for aluminum, iron and tungsten targets have been obtained by direct Monte-Carlo simulation of interactions with the help of the program SCIN_PC. Then the value of air kerma was computed analytically and kerma attenuation by concrete shielding was estimated with application of available reference information. Kerma values at checkpoints behind the concrete shielding of the existing bench, which is intended mainly for electron accelerators of smaller energy, have been estimated. Bench operating restrictions for adjustment works with the ILU-10 accelerator have been formulated
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61