H1 beam tube, cold (VCS, feeding cold guides to ILL7)

Diameter: 280 mm
Angle from RHF origin: 108.6 deg
Type: cold VCS
Distance from D2O vessel to the Bouchon: 4.6 m
Distance from noze to the D2O vessel: 0.36 m
Instrument using it: D17, FIGARO, IN5, IN6, IN10, D7, D11, IN12, LADI, IN11.
Reactor cut showing MCNP geometry [ pdf ]

This is ILL Data. Simulated by E. Farhi, P.A. Harraud (DS/CS) and S. Fuard (DPT/BPC), 2006.

Simulation overview

Beam tube

Measurement Capture Flux
[10¹⁰ n/s/cm2 gold foil]

(dist from core center, date)

Comment

MCNP Capture Flux
[10¹⁰ n/s/cm2]

Tripoli Capture Flux
[10¹⁰ n/s/cm2]

H1 (IN17, FIGARO, IN5, IN6, IN10, D7, D11, IN12, LADI, IN11)

2.60 (H113-1: 11.4 m, 11/08/1999)

phi=280 mm

11.0+/- 0.1 [Phi=6.8]
2.72 +/- 0.08 [at 11.4 m, Phi=1.04]

11.6 +/- 0.7 [Phi=6.9]
1.87 +/- 0.4 [at 11.4 m, Phi=.69]

Flux measured and simulated with MCNP and Tripoli at 5.2 m from the core (bouchon). Phi is the integrate rwa flux. The Capture flux is the integrated weighted flux (lambda/1.8). Fluxes given here assume NO guide.

Flux distributions at the Vanne de securite/Bouchon (5.2 m from core)

Spatial: homogeneous.
Divergence: gaussian, 0.97 deg half width horizontally and vertically.
Wavelength is not correlated to position
Wavelength is correlated to divergence

Simulation results

All tallies/monitors are given at L+5.2 m from the reactor core, per cm2, and usually as log10(intensity).

Overview [ ps ][ raw ]
Log Log energy full spectrum [ ps ][ raw ]
Energy spectrum 0-100 meV [ ps ][ raw ]
Wavelength spectrum [0-10 Angs] [ ps ][ raw ]
Angular distribution (divergence) [ ps ][ raw ]
Spatial distribution [ ps ][ raw ]
Horizontal divergence - wavelength correlation [ ps ][ raw ]

Computing for Science

ILL Reactor models

H1 beam tube, cold (VCS, feeding cold guides to ILL7)

Simulation overview

Simulation results