1. Status of Vertical Neutron Camera Integration
Albert Tsutskikh
Anatoli Krasilnikov
Yuri Kaschuck
Denis Prosvirin
SRC RF TRINITI
11 of April 2006

2. VNC Purposes
Collimated measurements of neutron source profile with spatial resolution along ITER major radius
Total neutron yield (fusion power) measurement
Optimization of the schemes of additional heating, including ICRH in particular

3. VNC Plasma Coverage Collimator lengths 1,4 – 1,6 m Diameters 30 mm
Coverage from –0.7 to 0.7 ρ

4. Divertor Port #2 Arrangement Drawing
Blanket module #18
Divertor cassette
Neutron collimator block
Detectors modules

5. 3D view

6. Removable Rail Part with collimator block

7. Added block part for diverter

8. Detector modules

9. MCNP – A General Monte Carlo N-Particle Transport Code
Program MCNP
(Transport Methods Group Los Alamos National Laboratory)
Version 4C
Cross-section library “endf601”
(Evaluated Nuclear Data File)

10. MCNP Model of ITER Coils Intercoil structure
Blanket module #18 with slot
Collimator Block
Diverter Cassette with block part

11. MCNP Model of ITER

12. MCNP Model of ITER

13. MCNP Model of VNC

14. Source spatial distribution
Model of Source
Source spatial distribution
En=14.1 MeV

15. Calculation results

16. Calculation results for U-238 FC, threshold – 1 MeV & NDD, threshold 7 MeV
Signal – flux of nonscattared neutrons,
background – flux of scattered neutrons

17. Calculation results

18. New Problem #1 From L. Bertalot
Interface Divertor cassette – Rail (second part of collimator block)

19. New Problem #2 From L. Bertalot
Need to verify if complete assembly fits inside the cask

20. New Problem #3
From L. Bertalot
Fixed to the Cassette Body

21. New Problem #4 From L. Bertalot Integrates the Locking Pins
Integrates the Rail

22. Conclusions
Lengths of collimators are enough for effective VNC operation. Correction coefficient should be applied for channel #1 & #10.
Integrated with divertor cassette Lower VNC is providing required collimation and plasma coverage for both (238U FC, NDD) discussing detectors.
Interface issues (integration with divertor cassette, interface with removable rail part and blanket module) could be solved during further design activity.

23. MUST BE SOLVED Procedure of assembling and installations
Tools for installation
Mechanical prelifting construction and other modification divertor cassette
Alignment and calibration
Mechanical details of rail
Agreement of blanket module # 18 modification to provide VNC lines of site penetration
Interfaces with other port diagnostics
Cable connections and communications
Analysis of tomography possibilities with discussing RNC and VNC lines of sight