Second Workshop on UCN and VCN Sources at ESS

9 May 2023, 09:00 → 10 May 2023, 18:00 Europe/Stockholm

ESS auditorium

Last year we held a HighNESS/LENS UCN/VCN workshop at the https://indico.esss.lu.se/event/2810/ where experts from various laboratories and Universities have gathered to propose and discuss ideas and challenges for the development of these sources. At the workshop, experts provided previous inputs and ideas.

A book of proceedings has been prepared as a special issue of the Journal of Neutron Research has been published 

The HighNESS UCN/VCN team has worked for this past year to develop these ideas in a conceptual design stage. The purpose of this follow-up workshop is to discuss the finalized ideas and receive feedback from the community. Additionally, based on the expected performance of the UCN and VCN sources at ESS, we would like to discuss in depth the possible applications. The first day will be dedicated to presentations of the designs, and discussions about applications, and the second half-day to feedback, outlook, and final discussions. In the afternoon of the second day, we plan to have a site visit to the ESS facility.

It will also be possible to follow the workshop via zoom however we would much like to prefer to see you at the ESS 

 

Tuesday, 9 May

1 Welcome and ESS General Status

Speaker: Helmut Schober (European Spallation Source)

2 ESS Science Update

Speaker: Giovanna Fragneto (European Spallation Source ERIC)

3 HighNESS project status

Speaker: Valentina Santoro (European Spallation Source ERIC)

4 Introduction to the HighNESS UCN/VCN sources designs

Speaker: Luca Zanini (European Spallation Source ERIC)

ZaniniWorkshop2023.pdf

10:35 Coffee Break

5 UCN Source Solid Deuterium in the twister

Speaker: Nicola Rizzi (Denmark Tekinske Universitet)

UCN_workshop.pdf

6 UCN Source SD2 in moderator cooling block

Speaker: Blahoslav Rataj (European Spallation Source ERIC)

Blahoslav_Rataj_Second Workshop on UCN and VCN Sources at ESS_9May2023.pptx

11:50 Group photo

12:00 Lunch

7 UCN Source He-II in the moderator cooling block

Speaker: Mathias Strothmann (Forschungszentrum Jülich GmbH)

9.5.23 HighNESS VCN UCN Workshop - M.Strothmann - HeUCN MCB.pdf

8 UCN source He-II In Large Beam Port

Speaker: Mina Akhyani (Lunds University (IBAN))

9 UCN source He-II In beam

Speaker: Richard Wagner (Institut Laue-Langevin - ILL)

20230509_2nd_Workshop_on_VCN_UCN_Sources_InbeamUCN_rwd.pdf

10 VCN source - clathrates

Speaker: Shuqi Xu

Status_of_clathrate_simulation_tools.pdf

11 VCN source in Twister-I

Speaker: Nicola Rizzi (Denmark Tekinske Universitet)

SD2converter_workshop_May2023.pdf

15:05 Coffee Break

12 VCN source in Twister -II

Speaker: Ben Folsom (European Spallation Source ERIC)

Full_SD2_5_9_2023.pdf

13 Diffraction-grating VCN interferometry and experimental search for neutron electric charge

Speaker: Alexander Ioffe

Ioffe UCN_VCN Workshop.pdf

14 VCN interferometry: Some history and (near) future perspectives

Speaker: Juergen Klepp

VCN_IFM_JK_lowRes.pdf

15 Opportunities with ultracold neutrons at the ESS

Speaker: Skyler Degenkolb

20230509_ESS_UCN_Opportunities_SMD.pdf

19:00 Working Dinner at Grands Restauranger i Lund

Grands Restauranger i Lund
Bantorget 1, 222 29 Lund
https://www.grandilund.se/

Wednesday, 10 May

16 The TRIUMF Ultra Cold Advanced Neutron source and nEDM experiment

The TRIUMF UltraCold Advanced Neutron (TUCAN) collaboration aims for the measurement of the neutron electric dipole moment (nEDM) with a one order of magnitude improvement of the current best limit. Ultra-cold neutrons (UCNs) suits for such experiment as they can be trapped and stored for several minutes. The collaboration works toward the completion of a new high-intensity UCN source. UCN are produced by a neutron spallation target driven by TRIUMF’s proton cyclotron and a combination of heavy water, liquid deuterium moderator and super-fluid 4He converter. This production scheme has been successfully demonstrated by a prototype UCN source operated from 2017-2019 at TRIUMF. With our newly upgraded source, a statistical nEDM sensitivity of 10−27 e⋅cm would be achieved in 400 days of data taking. The source will also deliver UCNs to a second port that will be open to proposals from users worldwide. This presentation will present an overview of the UCNs source and nEDM experiment installation at TRIUMF.

Speaker: Alexis Brossard

TUCAN_ESS2023_V2.pdf

17 New scattering kernels for solid deuterium and superfluid He4

Speaker: Rolando Granada (Argentine Atomic Energy Commission)

GranadaD2He5mat.pdf

18 UCN extraction from Solid Deuterium Moderator

Speaker: Ingo Rienaecker

UCN extraction from solid deuterium.pdf

10:30 Coffee break

19 Countering gravity in a VCN SANS instrument

Speaker: Mads Bertelsen (ESS DMSC)

20 Feasibility of a strong focusing synchrotron for neutron beams

We study the feasibility of storing cold neutron beams in a strong focusing synchrotron. We also propose an alternating-current (AC) dipole magnet to be used as a neutron acceleration device, and a pulsed quadrupole as a neutron beam kicker for injection and extraction. The AC acceleration device can provide adiabatic capture, acceleration or deceleration of neutron beams. It seems feasible to design a high quality neutron synchrotron for many future neutron beam applications, such as neutron life time measurements, “monoenergetic” neutron scattering experiments, pencil neutron beam applications, etc.

Speaker: Shyh-Yuan Lee

21 Discussion on UCN/VCN source

22 Discussion on a next call and close out

Speaker: Valentina Santoro (European Spallation Source ERIC)

12:30 Lunch

13:30 Site Visit