DIAGNOSTICS OF ULTRASHORT ELECTRON BUNCHES DEVELOPED AT JINR

O. Brovko, D. Kharlamov, O. Kozlov, S. Kostromin, R. Makarov, E. Matyushevskiy, N. Morozov, E. Syresinª, B. Zalikhanov, M. Yurkov

Joint Institute for Nuclear Research, Dubna, Russia

Abstract

Different methods for diagnostic of ultrashort electron bunches are developed at JINR-DESY collaboration within the framework of the FLASH and XFEL projects and JINR participation in the ILC project. The main peculiarity of these accelerator complexes is related to formation of ultrashort electron bunches with r.m.s. length 20÷300 μm. Novel diagnostics is required to provide femtoscale time resolution in the modern FEL like FLASH and future XFEL and ILC projects. Photon diagnostics developed at JINR-DESY collaboration for ultrashort bunches are based on calorimetric measurements and detection of undulator radiation. The MCP based radiation detectors are effectively used at FLASH for pulse energy measurements. The infrared undulator constructed at JINR and installed at FLASH is used for longitudinal bunch shape measurements and for two-color lasing provided by the FIR and VUV undulators. A special magnetic spectrometer is planning to be used in ILC for measurements of average electron energy in each bunch. The first test spectrometer measurements were performed within the JINR-DESY-SLAC collaboration.

ª – corresponding author

Paper Slides

304

PROJECT OF THE NUCLOTRON-BASED ION COLLIDER FACILITY (NICA) AT JINR

G. Trubnikov, N. Agapov, V. Alexandrov, A. Butenko, E.D. Donets, E.E. Donets, A. Eliseev, V. Kekelidze, H. Khodzhibagiyan, V. Kobets, A. Kovalenko, O. Kozlov, A. Kuznetsov, I. Meshkov, V. Mikhaylov, V. Monchinsky, V. Shevtsov, A. Sidorinª, A. Sissakian, A. Smirnov, A. Sorin, V. Toneev, V. Volkov, V. Zhabitsky, O. Brovko, I. Issinsky, A. Fateev, A. Philippov

Joint Institute for Nuclear Research, Dubna, Russia

Abstract

The Nuclotron-based Ion Collider fAcility (NICA) is a new accelerator complex being constructed at JINR aimed to provide collider experiments with heavy ions up to uranium at maximum energy (center of mass) equal to √s ~11 GeV/u. It includes new 6.2 MeV/u linac, 440 MeV/u booster, upgraded SC synchrotron Nuclotron and collider consisting of two SC rings, which provide average luminosity of 10²⁷cm^-2∙s^-1. The new facility will allow also an effective acceleration of light ions to the Nuclotron maximum energy and an increase of intensity of polarized deuteron beams up to the level above 10¹⁰ particles/cycle. Accelerator complex NICA is being built on the experience and technological developments at the Nuclotron facility and incorporates new technological concepts. The scheme of the facility, its operation scenario and beam dynamics are presented in the report.

ª – corresponding author

Paper Slides

82