RUPAC2018 - List of Authors (Rascvetalov, Ja.N.)

Paper	Title	Page
TUPSA49	Installation for Irradiation of Thin Foils by Halo Proton Beam on IHEP Accelerator	249
	Ja.N. Rascvetalov, G.I. Krupny, M.A. Maslov, V.N. Peleshko IHEP, Moscow Region, Russia
	The halo of proton beam arises due to proton elastic and coulomb scattering on the internal target. On 70 GeV IHEP accelerator (U-70) halo contains up to several per-cent of proton beam. It was shown by Monte Carlo method that on thin target (0.05-1 g/cm² foils) each halo proton crosses the foil specimen up to 10³ - 10⁵ times before it will be lost during U-70 cycle. The radiation damage level in foil specimens at 1020 crossings was estimated at about 0,17 dpa (displacement per atom). Accumulation of hydrogen and helium atoms during exposure was calculated for iron, nickel and chromium specimens. Some factors limiting the rate of accumulation of radiation damage and ways for its solutions are discussed. Simple installation with various material foils as targets is described together with the first proton expo-sure results of copper and aluminum foils. It is important, that foils irradiation by beam halo may be provided independently out of the main U-70 physical program. As concluded, radiation damage level compared with results got during one year research nuclear reactors can be accumulated during one U-70 run (one month).
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-RUPAC2018-TUPSA49
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WEPSB55	On the Formation of Induced Radioactivity on the U-70 Proton Accelerator
	Ja.N. Rascvetalov, G.I. Britvich, G.I. Krupny, M.A. Maslov, V.N. Peleshko, E.N. Savitskaya IHEP, Moscow Region, Russia
	Global induced radioactivity levels on the main ring of proton 70 GeV accelerator (U-70) were estimated. Modeling results of induced radioactivity accumulation on the typical particle canal downstream internal target by Monte Carlo method are given. The wide set of various material specimens was espoused during one U-70 run in vicinity of internal target and specific radioactivity of identified long-lived nuclides was measured. Decay curves of ambient dose and specific radioactivity were calculated and analyzed for all activated specimens. Some fragments of U-70 equipment from radioactive waste storage also were investigated and specific radioactivity of their long-lived nuclides were measured. Unexpectedly 44Ti with 60 years half-life was identified in some cooper and stainless steel fragments. Production cross sections of 44Ti (and other nuclides) on copper were evaluated after irradiation by 50 GeV protons. These data can be used to provide radiation safety when working with radioactive elements of accelerator equipment, as well as storing and disposing of radioactive waste.
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Paper

Title

Page

Installation for Irradiation of Thin Foils by Halo Proton Beam on IHEP Accelerator

249

Ja.N. Rascvetalov, G.I. Krupny, M.A. Maslov, V.N. Peleshko
IHEP, Moscow Region, Russia

The halo of proton beam arises due to proton elastic and coulomb scattering on the internal target. On 70 GeV IHEP accelerator (U-70) halo contains up to several per-cent of proton beam. It was shown by Monte Carlo method that on thin target (0.05-1 g/cm² foils) each halo proton crosses the foil specimen up to 10³ - 10⁵ times before it will be lost during U-70 cycle. The radiation damage level in foil specimens at 1020 crossings was estimated at about 0,17 dpa (displacement per atom). Accumulation of hydrogen and helium atoms during exposure was calculated for iron, nickel and chromium specimens. Some factors limiting the rate of accumulation of radiation damage and ways for its solutions are discussed. Simple installation with various material foils as targets is described together with the first proton expo-sure results of copper and aluminum foils. It is important, that foils irradiation by beam halo may be provided independently out of the main U-70 physical program. As concluded, radiation damage level compared with results got during one year research nuclear reactors can be accumulated during one U-70 run (one month).

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-RUPAC2018-TUPSA49

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSB55

On the Formation of Induced Radioactivity on the U-70 Proton Accelerator

Ja.N. Rascvetalov, G.I. Britvich, G.I. Krupny, M.A. Maslov, V.N. Peleshko, E.N. Savitskaya
IHEP, Moscow Region, Russia

Global induced radioactivity levels on the main ring of proton 70 GeV accelerator (U-70) were estimated. Modeling results of induced radioactivity accumulation on the typical particle canal downstream internal target by Monte Carlo method are given. The wide set of various material specimens was espoused during one U-70 run in vicinity of internal target and specific radioactivity of identified long-lived nuclides was measured. Decay curves of ambient dose and specific radioactivity were calculated and analyzed for all activated specimens. Some fragments of U-70 equipment from radioactive waste storage also were investigated and specific radioactivity of their long-lived nuclides were measured. Unexpectedly 44Ti with 60 years half-life was identified in some cooper and stainless steel fragments. Production cross sections of 44Ti (and other nuclides) on copper were evaluated after irradiation by 50 GeV protons. These data can be used to provide radiation safety when working with radioactive elements of accelerator equipment, as well as storing and disposing of radioactive waste.

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)