Лаборатория физики высоких энергий им. В. И. Векслера и А. М. Балдина

Научно-методический семинар № 12-2024

Дата и время: четверг, 7 ноября 2024 г., в 11:00

Место: корп. 215, к. 241, Лаборатория физики высоких энергий им. В. И. Векслера и А. М. Балдина, онлайн в Volna

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1. Тема семинара: «Thermal stabilisation and cooling system for TPC and ECAL Detectors of the MPD Experiment at the NICA Collider»

   Авторы: Умна Гхонейм^1,7, Сергей Мовчан¹, Алексей Бажажин¹, Александр Дорошкевич^1,2,3, Рафаэль Исаев^1,4, Павел Кудряшов¹, Илья Чепурченко¹, Григорий Арзуманян¹, Кахрамон Маматкулов¹, Александр Федотов¹, Ольга Иваньшина^1,3, Егор Шманай⁵, Илья Зур⁵, Юлия Федотова⁶, Виталий Шиманский<sup>6
   
   1</sup> — ОИЯИ
   ² — НПО «Физика-Солнце» АН РУз
   ³ — Государственный университет «Дубна»
   ⁴ — Агентство инноваций и цифрового развития (Баку, Азербайджан)
   ⁵ — Институт ядерных проблем Белорусского государственного университета
   ⁶ — Кафедра физики твердого тела и нанотехнологий Белорусского государственного университета
   ⁷ — Национальный исследовательский Томский политехнический университет

   Докладчик: Умна Гхонейм

   Аннотация:
   

   The thermal stabilization and cooling systems for the TPC and ECAL detectors for the MPD experiment (NICA project) are based on the water leakless concept. Realization of such a concept put forward some specific requirements for optimal pipe, namely absence of radiation activation, resistance to chemical corrosion, a small diffusion value through the pipe wall into water (water is at pressure of about 0.5 bar), and mechanical stability and flexibility for piping on MPD.

   The present experiment is focused on the verification of plastic hoses subjected to neutron irradiation as the candidate for supplying the distilled or deionized water to the cooling system of MPD. Presuming that the hoses will be located within the area of TPC FE electronics, they should be resistant to neutron fluence of about 10¹¹ n/cm² (with the energy of 1 MeV). So, candidate plastic hoses were irradiated with neutrons (with an energy up to 1 MeV) with the following fluences: F1 = 10⁹ n/cm², F2 = 10¹⁰ n/cm², F3 = 10¹¹ n/cm², and F4 = 10¹² n/cm².

   Mechanical tensile tests, Raman spectroscopy, and air permeability measurements were performed to check plastic hoses status before and after irradiation. COMSOL Multiphysics modelling software is also being used to study the selected candidate pipes. Based on the research conducted, the PVC hose was selected to be the best candidate for installing the thermal stabilization and cooling system.




2. Тема семинара: «In-beam tests of double-sided silicon strip detector modules for the BM@N Experiment»

   Авторы: Дмитрий Дементьев¹, Рауль Артече Диас^1,4, Сесар Себаллос Санчес¹, Анатолий Коложвари¹, Владимир Леонтьев^1,2, Николай Мальцев³, Юрий Мурин¹, Алехандро Родригес Альварес^1,4, Игорь Руфанов¹, Алексей Шереметьев¹, Mихаил Шитенков¹, Владимир Жеребчевский<sup>4
   
   1</sup> — ЛФВЭ ОИЯИ
   ² — Московский государственный университет
   ³ — Санкт-Петербургский государственный университет
   ⁴ — Центр прикладных технологий и ядерного развития (Гавана, Куба)

   Докладчик: Дмитрий Дементьев

   Аннотация:
   

   The results of the in-beam tests of the final version of the DSSD modules for the Silicon Tracking System of BM@N experiment at JINR NICA facility are presented. Each module consists of a double-sided microstrip silicon sensor and front-end electronics connected to each other via low-mass aluminum micro-cables. Investigations of the module characteristics and tests of the readout electronics were done at proton synchrocyclotron SC-1000 in Petersburg Nuclear Physics Institute. Signal-to-noise ratio, spatial resolution and detection efficiency were measured. Performance of the areas with strips with a second metallization layer and strips with bonding failures was studied. Dependencies of the main operation parameters of the modules on the bias voltage and threshold were also obtained. The average registration efficiency of the modules resulted in values higher than 99% with signal-to-noise ratio typical values for both sides of the sensor not less than 21 and a spatial resolution of 15.4 μm.