small angle neutron scattering resolution calculator

However, since the beam divergences required for a high or medium resolution of Intensity of G3 with the m = 2 supermirror is simply due to its larger angular divergence, as can be seen inįig. The intensity is highest when the m = 2 supermirror is used, followed by Ni-58 and Ni-natural as expected. Here, the m = 2 supermirror was assumed for G1 and G2. The neutron spectra when different coating materials (Ni-58, Ni-natural, m = 2 supermirror) are used for G3 are shown in Fig.

Through each guide section, the beam intensity drops over the entire wavelength. In this calculation, it was assumed that the G1 and G2 guides were made of m = 2 supermirrors and the G3 guide was made of natural Ni. The neutron spectra after guides G1, G2 and G3 are also shown in Fig. The neutron spectra at the cold source and after guides G1, G2 and G3. The beam diameter B at the detector is simply given as Of the detector is assumed to vary continuously and vertical spreading of the beamĭue to gravity is ignored. ( d = 0.5 cm) and the sample to detector distance. The minimum Q can be calculated easily by using the beam size at the detector, the detector resolution = L2 = 20 m), a source aperture of 3 cm is used. When L1 = L2 = 20 m, the source aperture and the sample aperture are assumed to beĥ cm (A1) and 1.25 cm (A2) in diameter respectively. Sample to detector distance are assumed to be 20 m, comprising a 40 m SANS instrument.Īll the configurations are set to be symmetric the source to sample distance (L1)Īnd the sample to detector distance (L2) are equal. In this calculation, both the length of the pre-sample flight path and the maximum The Q range of the SANS instrument at HANARO is estimated from a simple calculation. The instrument layout and to enhance the instrument performance, a Monte Carlo simulation H8 at Brookhaven National Laboratory, which was chosen as a sample instrument (SeegerĪn analytical calculation was applied to obtain the optimum SANS instrument designĪnd the appropriate scattering vector range of the instrument. Of agreement between these programs is fairly good for the triple-axis spectrometer Recently, a study to compare the various simulation tools showed that the level Monte Carlo simulations are being used for new instrumentĪnd guide designs (Bordallo et al., 2002 Demmel et al., 2004 Lieutenant et al., 2005 Tamura et al., 2004 Zeitelhack et al., 2006 ). Currently several Monte Carlo simulation tools for neutron Since neutron instruments are very expensive to construct, it is essential to optimize Which consisted of domestic users and HANARO personnel. Instrument was selected as a top-priority instrument by an instrument selection committee A state-of-the-art small-angle neutron scattering (SANS) The cold neutron research facility project The potential impact of HANARO on the scientific and engineering research areas in However, as it does not have a cold neutron source and cold neutron instruments, Is a world class research reactor which has a peak thermal neutron flux of 5.4 × 10 14 n cm −2 s −1. The 30 MW HANARO research reactor at the Korea Atomic Energy Research Institute (KAERI)

Small angle neutron scattering resolution calculator