H2 Beam tube description (thermal guides to ILL7)

Diameter: 210 mm
Angle from RHF origin: 100 deg
Type: thermal (D2O)
Distance from D2O vessel to the Bouchon: 4.66 m
Distance from noze to the D2O vessel: 0.69 m
Instrument using it: IN22, D23, IN13, D10, OrientExpress, Vivaldi, S18, SALSA, D1B
Reactor cut showing MCNP geometry [ pdf ]

This is ILL Data. Simulated by E. Farhi, P.A. Harraud and S. Fuard, 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]

H2 (IN22, D23, IN13, D10, OrientExpress, Vivaldi, D1B)

0.722 (H22-1: 11.4 m, 08/09/2003)

phi=210 mm, conical 7.2 deg, most guides m=2, starting at 2.33 m.

6.1 +/- 0.1 [Phi=7.1]
1.03 +/- 0.04 [at 11.4 m]

5.8 +/- 0.3 [Phi=7.1]
1.0 +/- 0.2 [at 11.4 m]

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). No guide model.

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

H2 Beam tube description (thermal guides to ILL7)

Simulation overview

Simulation results