TY - JOUR
T1 - Figure-of-Merit for a Cold Coupled Moderator at the SNS Second Target Station suited for Direct Geometry Inelastic Spectrometers
AU - Ehlers, Georg
AU - Sala, Gabriele
AU - Gallmeier, Franz
AU - Herwig, Kenneth W.
N1 - Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2018/6/4
Y1 - 2018/6/4
N2 - The suite of moderators for the Second Target Station (STS) at the Spallation Neutron Source (SNS) in Oak Ridge is currently undergoing the planning stage at which various options and configurations are being considered. The current plans for the instrument suite include two direct geometry inelastic spectrometers, CHESS and HERTZ, which will receive beam from cold moderators and work mostly in the 1-20 meV incident energy range. CHESS will be a relatively short (wide bandwidth) instrument that is dedicated to studying small samples (∼mm3) with coarse energy resolution (2.5 - 5% of E i). HERTZ on the other hand will be designed to achieve very good energy resolution, 1 - 3% of E i, using a long secondary flightpath with a ∼ 4 × 4 cm2 beam on sample. In this contribution, we will discuss the implications of these design requirements for the optimal moderator pulse width, and for the repetition rate that would be best suited for the spectrometers.
AB - The suite of moderators for the Second Target Station (STS) at the Spallation Neutron Source (SNS) in Oak Ridge is currently undergoing the planning stage at which various options and configurations are being considered. The current plans for the instrument suite include two direct geometry inelastic spectrometers, CHESS and HERTZ, which will receive beam from cold moderators and work mostly in the 1-20 meV incident energy range. CHESS will be a relatively short (wide bandwidth) instrument that is dedicated to studying small samples (∼mm3) with coarse energy resolution (2.5 - 5% of E i). HERTZ on the other hand will be designed to achieve very good energy resolution, 1 - 3% of E i, using a long secondary flightpath with a ∼ 4 × 4 cm2 beam on sample. In this contribution, we will discuss the implications of these design requirements for the optimal moderator pulse width, and for the repetition rate that would be best suited for the spectrometers.
UR - http://www.scopus.com/inward/record.url?scp=85048389720&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/1021/1/012032
DO - 10.1088/1742-6596/1021/1/012032
M3 - Conference article
AN - SCOPUS:85048389720
SN - 1742-6588
VL - 1021
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012032
T2 - 22nd Meeting of the International Collaboration on Advanced Neutron Sources, ICANS 2017
Y2 - 27 March 2017 through 31 March 2017
ER -