Stand und Planung des Neutronen-Zähler Systems (NEUCOUNT) und des Neutronen-Aktivierungs Systems (NEUACT)

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Adrian Waldfogel
vor 6 Jahren
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1 Neutron Diagnostik Design Review, IPP-HGW Stand und Planung des Neutronen-Zähler Systems (NEUCOUNT) und des Neutronen-Aktivierungs Systems (NEUACT) Arthur Weller Entwicklung und Realisierung durch externe Diagnostik-Gruppen: Neutronen-Zähler: Physikalisch-Technische Bundesanstalt (PTB), Braunschweig Neutronen-Aktivierungs-System: Institute of Plasma Physics and Laser Microfusion (IPPLM), Warschau Institute of Nuclear Physics, Krakau A. Weller

Neutron-Counter Diagnostics for W7-X ( conceptual design by PTB Braunschweig ) Objectives: Determination of neutron fluxes, ion temperatures, fast ion densities direct measurement of fusion

2 Neutron-Counter Diagnostics for W7-X ( conceptual design by PTB Braunschweig ) Objectives: Determination of neutron fluxes, ion temperatures, fast ion densities direct measurement of fusion reactions, calibration and neutron transport calc. required Proposed System, Main Work Packages : 5 counter-blocks (1 in each module) + 1 in machine center dynamic range: n/s (long counters) absolute calibration by radioactive source time resolution limited by max. count-rate of ~ 100 khz Status : framework agreement IPP-PTB exists, W7X-PTB agreement until 2011 in progress several meetings on conceptual design and R&D Nov 2008: kick-off meeting for intensified collaboration work plan until 2011 roughly defined, detailing in progress progress on neutron source and MCNP models IPP staff involved in R&D at PTB Braunschweig Critical Issues : licensing for D-D for the time of 1 st plasma requires at least 2 calibrated detector blocks, before closure of vacuum vessel (available access and time?) Design work at IPP required for calibration tools and support structures A. Weller PHA+MFS Design Review

900 m (height above equatorial plane) Phi = 326 +n x 72 counter in

3 2008: New Neutron Counter Positions ( Long Counters ) center of place holder at: R = m H = m (height above equatorial plane) Phi = 326 +n x 72 counter in center of W7-X at: R = 0.00 m H = m (center at H = m) A. Weller PHA+MFS Design Review

In-Situ Calibration of W7-X Neutron Counters - radioactive source, compact neutron

- neutron source to be moved along (helical) plasma axis desirable (requires rail system or

4 In-Situ Calibration of W7-X Neutron Counters - radioactive source, compact neutron generator? - neutron source to be moved along (helical) plasma axis desirable (requires rail system or platforms inside vessel or sufficient open ports) available IPP Pu 238 B radioactive source: Q = n/s (August 2012) compact neutron generator: Q 10 8 n/s (as desired) advantages: A. Weller PHA+MFS Design Review f 2π 1 cps s( ϕ) dϕ 2πQ n/s 0 cal spectrum (D-D, 2.5 MeV) S = Q active only during measurements drawbacks: movability, stability

Fertigungszeichnungen Moderator Trag- und Befestigungs-Struktur, Plattformen

5 Neutronen-Zähler: Komponenten u. Arbeitspakete Detektor-Entwicklung Geometrie Moderatoren, MCNP Detektor-Tests in PTB Fertigungszeichnungen Moderator Trag- und Befestigungs-Struktur, Plattformen Befestigung/Verstellmechanik für n-quelle im Torus Kabeltrassen Anordnung Elektronik Racks nahe Detektor sonstige Peripherie A. Weller PHA+MFS Design Review

6 Neutron Counter WBS (Ausschnitt) A. Weller PHA+MFS Design Review

Neutron-Activation Diagnostics for W7-X ( based on proposal by IPPLM / INP Cracow ) Objectives: Determination of neutron fluences by activation methods direct measurement of fusion reactions, support

required Proposed System, Main Work Packages : 1-2 sample positions close to plasma (AEK31, AEE50) multi-nuclide activation samples fast transport system to analysis station outside torus hall

7 Neutron-Activation Diagnostics for W7-X ( based on proposal by IPPLM / INP Cracow ) Objectives: Determination of neutron fluences by activation methods direct measurement of fusion reactions, support of n-counters, neutron transport calc. required Proposed System, Main Work Packages : 1-2 sample positions close to plasma (AEK31, AEE50) multi-nuclide activation samples fast transport system to analysis station outside torus hall activation analysis with HPGe detector location of sample in immersion tube Status : 1 st agreement on cooperation IPP-IPPLM-INP ends 2008, new agreement planned until 2011 or beyond several meetings on conceptual design and R&D April 2008: kick-off meeting for intensified collaboration work plan until 2011 roughly defined, detailing in progress progress on neutron source and MCNP models transfer of CAD data in preparation, work on pilot system at PF1000 started neutron profile port AEK30 Critical Issues : no funds by IPP (according to priorities), provisional IPP responsible officer capabilities of n-transport calculations (MCNP) limited at IPP construction and operation relies on long-term IPP-IPPLM/INP involvement A. Weller PHA+MFS Design Review

8 Platzhalter Rohrpost-System und Analysestation (in Arbeit) (siehe change note 1-QNN-C0002) S. Renard A. Weller PHA+MFS Design Review

9 W7-X Torus Hall S. Renard Detector AEK31 AEK30 AEE50 AEE50 A. Weller PHA+MFS Design Review

10 Neutronen-Aktivierung: Komponenten u. Arbeitspakete Stutzen Anschluss Transport-System (AEK31) Tauchrohr im Stutzen zur Exposition von Aktivierungsproben Aufbau eines Pilotsystems im IPPLM Rohrpost Anordnung Stütz- und Befestigungs-Struktur Rohrpost Wanddurchbruch Proben-Behälter Raum-Errichtung für Analyse-Station Detektor-Halterungen Elektronik Racks Druckluft-Leitungen, Peripherie CAD Unterstützung für MCNP A. Weller PHA+MFS Design Review

11 Neutronen-Aktivierung WBS (Ausschnitt) A. Weller PHA+MFS Design Review

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