Polarization facilities at JINR Accelerator Complex / Helium infrastructure of cryogenic complex of collider

Seminars

VBLHEP Specialized Seminar

Section of Accelerator Physics and Technology, Cryogenics

Date and Time: Tuesday, 10 September 2024, at 11:00 AM

Venue: bld. 2, Accelerator Control Room, Veksler and Baldin Laboratory of High Energy Physics

Information about the seminar

  1. Seminar topic: “Polarization facilities at JINR Accelerator Complex”

    Speaker: Kuzma Ivshin

    Abstract:

    Polarization facilities are developed at the JINR accelerator complex in the framework of the polarization research program under the NICA project.

    Those are: the polarized deuteron and proton source SPI, SPI low energy polarimeter and a linac output polarimeter.

    The project assumes the design and construction of a universal high-intensity source of polarized deuterons (protons) using a charge-exchange plasma ionizer. The output ↑D+ (↑H+) current of the source is expected to be at a level of 10 mA. The polarization will be up to 90% of the maximal vector (±1) for ↑D+ (↑H+) and tensor (+1, -2) for ↑D+ polarization. The report describes the JINR polarized ion source operating by means of the atomic beam method. The latest results of the SPI testing are presented. Polarized and unpolarized deuteron beams as well as the polarized proton beam were produced to accelerate in the NUCLOTRON.

    The conceptual design of a new universal low energy polarimeter at NUCLOTRON is also presented. It is proposed to install a new polarimeter behind the linear accelerator. The 3He target of this setup allows one to carry out measuring both the vector polarization of protons and vector and tensor polarization of deuterons. It is assumed that the new design of the polarimeter will make it possible to measure vector and tensor polarization of deuterons at the same time. Fabrication of the modern polarimeter is in progress now.

    The status of the above facilities and the results achieved are presented.


  2. Seminar topic: “Helium infrastructure of cryogenic complex of collider. Results of work on preparation for technological run”

    Speaker: Anton Konstantinov

    Abstract:

    Технологический сеанс кольца Коллайдера запланирован на начало 2025 г. Программа сеанса включает охлаждение магнитов до рабочей температуры 4,5 К, испытания магнитно-криостатной системы на герметичность и ввод рабочего тока в магниты, проверка работоспособности корректоров. Для охлаждения магнитов будет задействовано новое оборудование криогенного комплекса: рефрижераторы РСГ №№ 2, 3, ожижитель гелия ОГ-1000, холодное хранилище гелия КЦГ-40/0,5 и разветвленная система криогенных трубопроводов.

    В статье представлены результаты испытаний новых установок криогенного комплекса и описаны технологические решения, которые позволят обеспечить оптимальный режим работы оборудования ускорителя при гелиевых температурах