BrightnESS! Work Package 4: Innovation of Key Neutronic Technologies: Detectors and Moderators

Transcription

1 ! Work Package 4: Innovation of Key Neutronic Technologies: Detectors and Moderators 25 September 2015 Richard Hall-Wilton (Work Package Leader)! Task 4.1 The resolution challenge

2 Introduction : Building partnerships and promoting synergies for the highest scientific impact on ESS Task 4 is a technical task focussed on challenges in neutronic technologies Enabling next generation performant detectors and moderators Technological risk reduction for the delivery of the ESS project By enhancing moderator and detector capability, maximise the early science impact of ESS Fundamentally in-kind and collaborative tasks, relying on the expertise of partner institutes involved! Task 4.1 2

3 Technology Challenge: Enabling Science eg

4 Technological Risk Reduction Task 4 is a technical task focussed on challenges in neutronic technologies It is about validating and realising these technologies It is about taking novel technologies selected for ESS from Technological Readiness Level 3-5 to 8-9 Aim: helping a smooth start for ESS scientific output 4

5 Brightness of ESS : Neutron Flux Performance: slow (< ev) neutron source brightness 6x x10 14 λ)=)3)å) h=3)cm,)w=8)cm)) cold))moderator) p,h 2 ) ESS 5 MW, 3 cm flat moderator ESS 5 MW, TDR 2013 ISIS TS1 128 kw ISIS TS2 32 kw SNS 1 MW J-PARC 300 kw ILL 57 MW n) 6x10 14 λ)=)1.5)å) h=3)cm,)w=8)cm) thermal)mod.) opmmal)posimon) ) Bu$erfly ) Bu$erfly) )) bi,spectral) bi,spectral) moderator:) cold,)thermal) moderator) 2x10 14 TDR)(2013)) ) Conv.)mod)(2010)) H 2 ) n) 4x x10 14 Conv.)&TDR)(2013)) ESS)pulse) ESS)pulse) shapes) shapes) 1x x x x x x x

6 Detectors: Helium-3 Crisis Helium- 3 isotope used as detec2on medium for most neutrons worldwide today Since 2009, Helium- 3 Crisis is ongoing: scarce resource For ESS alterna2ves must be developed and implemented Strategic challenge for Europe

7 Technological Challenges: Detectors What can you do with this brightness? Instrument Design Smaller samples Higher flux, shorter experiments More detailed studies Multiple methods on 1 instrument Larger solid angle coverage Implications for Detectors Developments*required*for*detectors*for*ESS detectors Better Resolution (position and time) Channel count Rate capability and data volume Lower background, lower S:B Larger dynamic range Larger area coverage Lower cost of detectors Also:*scarcity*of*HeliumD3*. Task 4.1 The Resolu2on Challenge Task 4.2: The Intensity Fron2er Task 4.4: Detector Realisa2on Task 4.3: Realising Large Area Detectors 7

8 Technological Challenges: Detectors Task 4.1 The Resolu2on Challenge Task 4.2: The Intensity Fron2er Task 4.3: Realising Large Area Detectors Task 4.4: Detector Realisa2on 3m! 0.8m! 2.4 m2! 8

9 Brightness of ESS : Neutron Flux Performance: slow (< ev) neutron source brightness 6x x10 14 λ)=)3)å) h=3)cm,)w=8)cm)) cold))moderator) p,h 2 ) ESS 5 MW, 3 cm flat moderator ESS 5 MW, TDR 2013 ISIS TS1 128 kw ISIS TS2 32 kw SNS 1 MW J-PARC 300 kw ILL 57 MW n) 6x10 14 λ)=)1.5)å) h=3)cm,)w=8)cm) thermal)mod.) opmmal)posimon) ) Bu$erfly ) Bu$erfly) )) bi,spectral) bi,spectral) moderator:) cold,)thermal) moderator) 2x10 14 TDR)(2013)) ) Conv.)mod)(2010)) H 2 ) n) 4x x10 14 Conv.)&TDR)(2013)) ESS)pulse) ESS)pulse) shapes) shapes) 1x x x x x x x Enabled by advanced moderator design 9

10 Technological Challenges: Moderators Budapest Research Reactor 10

11 Technological Challenges: Moderators Liquid hydrogen moderator since 2000 Liquid H 2 CNS at BRR Replacement by a more compact moderator Performance of LH2 CNS at BRR This task 4.5 enables a golden opportunity for ESS to share the experience in the moderator replacement project 11 8

12 WP4: Detectors and Moderators Objectives The technological evolution of neutron detectors in terms of resolution, intensity and dimensions. WP4 represents turning novel developments from TRL 3-5 in to TRL 8-9 by technical innovation during this key realisation phase. Tasks Deliverables Task 4.1 Task 4.2 Neutron detectors - The resolution challenge Neutron detectors - The intensity frontier ESS, CERN, IEAP, MiUN ESS, BNC, LU 4.1 Integration plan for readout M Detector electronics chain M Counting rate capability M Natural and enriched Gadolinium convertors design M Test for technology demonstrator Standarised test procedures for performance of detectors for early ESS instruments M23 M33 Task 4.3 Task 4.4 Task 4.5 Realising large areas Detectors ESS, ILL Detector Realisation ESS, LU Moderator testing and development beamline BNC Report on the engineering design of BRR low dimensional moderator Simulation and Generic multi-grid design 4.6 Detector characterisation M Report on the conception design of the ESS an the BRR test beamline Monte Carlo simulations for early ESS instruments M Reflectometry detector M34 M Module for NMX detector M35 M M21 Large area detector spectrometry Final verification of BRR moderator M36 M36 12

13 Thank You!! Task 4.1