UCN source with superfluid helium at WWR-M reactor

Serebrov, A. P.; Lyamkin, V. A.; Fomin, A. K.; Prudnikov, D. V.; Samodurov, O. Yu; Kanin, A. S.

doi:10.1088/1742-6596/798/1/012147

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…This means that at the ESS for a sD 2 UCN source a heat load of at least several kW at 5 K can be expected, taking into account that the heat load on the FRM II UCN source is ∼500 W. A cooling power of several kW at 5 K is technically feasible, but already requires cooling machines at the commercially available upper power limit. Concerning the fact, that for a He-II source temperatures below 1 K are desired, thus requiring even more high-power cooling techniques, a sD 2 source for the inpile case seems to be more realistic and easier achievable, although Serebrov et al have demonstrated at the WWR-M reactor at PNPI that, with an efficient thermal shielding and powerful cooling techniques, it is possible to remove 60 W of heat from a He-II converter at a temperature of 1.37 K [55]. An effective sD 2 converter thickness of a few cm would be sufficient, if the UCN source is placed at a position where a strong cold neutron flux from the lower liquid D 2 moderator hits the deuterium converter.…”

Section: Possible Impacts For a Ucn Source At The Essmentioning

confidence: 99%

The source for ultra-cold neutrons at the FRM II

Frei

2023

JNR

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At the Forschungs-Neutronenquelle Heinz Maier-Leibnitz (FRM II) of the Technical University of Munich (TUM) a new source for ultra-cold neutrons (UCN) with a solid deuterium converter is currently under construction. This summary paper shall give an overview of the project and its current status. Research results concerning converter preparation, para-to-ortho conversion, radiation effects and neutron transport, which have been achieved in the last years, are presented and their relevance and transferability for the design of a future UCN source at the European Spallation Source (ESS) are discussed.

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Section: Possible Impacts For a Ucn Source At The Essmentioning

confidence: 99%

The source for ultra-cold neutrons at the FRM II

Frei

2023

JNR

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“…There are many new UCN sources around the world currently operational, being developed, or proposed [134][135][136][137][138][139][140][141][142][143] based on the principles of the superthermal process. Superfluid liquid helium (LHe) and solid deuterium (SD 2 ) have been successfully applied as UCN converters.…”

Section: Statisticalmentioning

confidence: 99%

Electric dipole moments and the search for new physics

Alarcón¹,

Alexander²,

Anastassopoulos³

et al. 2022

Preprint

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Static electric dipole moments of nondegenerate systems probe mass scales for physics beyond the Standard Model well beyond those reached directly at high energy colliders. Discrimination between different physics models, however, requires complementary searches in atomic-molecular-and-optical, nuclear and particle physics. In this report, we discuss the current status and prospects in the near future for a compelling suite of such experiments, along with developments needed in the encompassing theoretical framework.

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“…The production volume is made of 1500 L of superfluid helium at 0.45 K and the expected UCN production rate is 0.3 UCN/cm 3 /s. The third source will be built at the WWR-M reactor at PNPI, Gatchina, Russia [14]. UCN will be produced in a 1.2 K superfluid helium bath.…”

Section: Ultracold-neutron Production In Superfluid Heliummentioning

confidence: 99%

Toward the First Ultracold-Neutron Production at TRIUMF

Pierre

2018

Proceedings of the International Conference on Neutron Optics (NOP2017)

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The TUCAN collaboration is currently setting up the first ultracold-neutron (UCN) source of its kind in Canada. It combines a neutron-spallation-driven source with a heavy-water primary moderator, along with a superfluid-helium UCN converter. Thanks to the expertise accumulated during the development of the source at the Research Center for Nuclear Physics (RCNP, Osaka University), a UCN density of 26 UCN/cm 3 at 90 neV critical energy was achieved in Japan. The source has been moved to Canada in 2016. Over the last year, we successfully commissioned the proton beamline and the spallation target dedicated to UCN. In addition, we were able to moderate spallation neutrons to thermal and cold energies. Finally, we performed successful cooling tests of the UCN converter below 1 K. This contribution presents the first results of the source commissioning process.

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UCN source with superfluid helium at WWR-M reactor

Cited by 7 publications

References 2 publications

The source for ultra-cold neutrons at the FRM II

The source for ultra-cold neutrons at the FRM II

Electric dipole moments and the search for new physics

Toward the First Ultracold-Neutron Production at TRIUMF

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