guides
ILL H17/H171/H172
guide switch - H17, ILL
In 2006/2007, SwissNeutronics manufactured the H17/H171/H172 neutron guide for the Institute Laue-Langevin. It starts as a two channel guide switch (cross-sections: constant 80mm x 80mm and tapered 25mm x 80 mm) with guide paths curved in horizontal and vertical directions. The substrate material is N-ZK7 with supermirror coatings from m = 1.5 to 3. Several features are machined into the glass to accommodate the ILL clip system, external alignment mirrors, front face protection masks, etc.
- type: vertical guide switch
- path/profile: hor. & vert. curved (polygonal approx.), lower beamline divergent
- cross-section: 80 × 80mm˛, 80 × 24mm˛ → 80 × 30mm˛
- length: 13.5m, 28m
- coating: Ni/Ti, m = 1.5 → 3
- substrate: N-ZK7 (Borkron)
- high precision of relative position of sub-beams ≈ 0.01mm
- various features machined in glass to accommodate ILL clip system, protection masks at dedicated locations
polarizing neutron guide-i-NSE JRR-3M
In 2004, SwissNeutronics supplied a 6 m long polarizing neutron guide to JRR-3M. The spin selective coatings are FeCoV/TiN supermirror with m = 2.5. The glass guide represents also the vacuum boundary and is enveloped by a magnetic cage, providing the guide field. The magnetic cage and the suspending mechanics were delivered by SwissNeutronics.
i-NSE JRR-3M
i-NSE JRR-3M
- type: polarizing neutron guide
- path/profile: curved (polygonal approx.)
- cross-section: 20 × 40mm˛
- length: 6m
- coating: FeCoV/TiN, m = 2.5
- substrate: Borofloat
- magnetic guide field ≈ 60G
elliptic neutron guide - HRPD, ISIS
In 2007 the High Resolution Powder Diffractometer at ISIS replaced its old guide by a new advanced guide with elliptic profile. The profile and the variation of the supermirror coating along the guide were developed for best neutron transport considering intensity and instrumental resolution. SwissNeutronics delivered and installed the 90m long guide.
ISIS HRPD guides
ISIS HRPD guide details
- type: elliptic neutron guide
- path/profile: elliptic, curved (polygonal approx.)
- cross-section: 25 × 80mm˛ @ entrance → 60 × 120mm˛ @ max. → 20 × 40mm˛ @ exit
- length: 90m
- coating: Ni/Ti m = 1.5 → 3
- substrate: float glass, Borofloat
HRPD guide installed
HRPD @ ISIS
HRPD @ ISIS
beam bender - BL04 a & b reflectometers, SNS
The beamlines BL04 a and b at SNS accommodate reflectometers dedicated for the investigation of magnetic and liquid samples respectively. Both beamlines use beam benders to avoid the direct sight from the sample into the moderator, thus suppressing undesired fast neutrons and gamma radiation at the sample. This is achieved within a relative short distance without compromising the transport of short wavelengths by subdividing the beam into several channels and supermirrors of m = 3.6 at the concave sides. The guides are installed in massive, tight steel jackets to efficiently avoid streaming of undesired background from the moderator.
BL04 a&b
BL04 a&b in casing
- type: multi-channel beam bender – 4, 5 channels respectively
- path/profile: curved (polygonal approx.)
- cross-section: magnetics 80 × 50mm˛, liquids 90 × 45mm˛
- length: 16m, 12m
- coating: Ni/Ti m = 2, 3.6
- substrate: float glass, Borofloat
- installation in massive, tight steel jackets
