8 research outputs found
Physical characterization of sunflower seeds dehydrated by using electromagnetic induction and low-pressure system
Drying is a widely used food preservation process in which water removal minimizes much of the moisture that causes deterioration reactions that impact the bioproduct quality. The objects of studying are high oleic sunflower seeds which are recognized as a worldwide source of edible oil; consequently, they have significant importance on health and food security. This work presents part of the results of a systematic study to compare the affectations on the several physical parameters of sunflower seeds and kernels with the Thermo-Solar Dehydration method (TSD) compared to Dehydration with Electromagnetic Induction at Low Pressures (DEMILP), finding that the in the last one the time to reach the 8% of the total moisture content was 2.5 times shorter, interesting physical effects and an increment of 5% in the volumetric expansion coefficient, reflected in a reduction of the cut resistance (Dehull) of 0.5KgF significant advantages for the food drying industry
MITS: the Multi-Imaging Transient Spectrograph for SOXS
The Son Of X-Shooter (SOXS) is a medium resolution spectrograph R~4500
proposed for the ESO 3.6 m NTT. We present the optical design of the UV-VIS arm
of SOXS which employs high efficiency ion-etched gratings used in first order
(m=1) as the main dispersers. The spectral band is split into four channels
which are directed to individual gratings, and imaged simultaneously by a
single three-element catadioptric camera. The expected throughput of our design
is >60% including contingency. The SOXS collaboration expects first light in
early 2021. This paper is one of several papers presented in these proceedings
describing the full SOXS instrument
The VIS detector system of SOXS
SOXS will be a unique spectroscopic facility for the ESO NTT telescope able
to cover the optical and NIR bands thanks to two different arms: the UV-VIS
(350-850 nm), and the NIR (800-1800 nm). In this article, we describe the
design of the visible camera cryostat and the architecture of the acquisition
system. The UV-VIS detector system is based on a e2v CCD 44-82, a custom
detector head coupled with the ESO continuous ow cryostats (CFC) cooling system
and the NGC CCD controller developed by ESO. This paper outlines the status of
the system and describes the design of the different parts that made up the
UV-VIS arm and is accompanied by a series of contributions describing the SOXS
design solutions.Comment: 9 pages, 13 figures, to be published in SPIE Proceedings 1070
SOXS Control Electronics Design
SOXS (Son Of X-Shooter) is a unique spectroscopic facility that will operate
at the ESO New Technology Telescope (NTT) in La Silla from 2020 onward. The
spectrograph will be able to cover simultaneously the UV-VIS and NIR bands
exploiting two different arms and a Common Path feeding system. We present the
design of the SOXS instrument control electronics. The electronics controls all
the movements, alarms, cabinet temperatures, and electric interlocks of the
instrument. We describe the main design concept. We decided to follow the ESO
electronic design guidelines to minimize project time and risks and to simplify
system maintenance. The design envisages Commercial Off-The-Shelf (COTS)
industrial components (e.g. Beckhoff PLC and EtherCAT fieldbus modules) to
obtain a modular design and to increase the overall reliability and
maintainability. Preassembled industrial motorized stages are adopted allowing
for high precision assembly standards and a high reliability. The electronics
is kept off-board whenever possible to reduce thermal issues and instrument
weight and to increase the accessibility for maintenance purpose. The
instrument project went through the Preliminary Design Review in 2017 and is
currently in Final Design Phase (with FDR in July 2018). This paper outlines
the status of the work and is part of a series of contributions describing the
SOXS design and properties after the instrument Preliminary Design Review.Comment: 10 pages, 7 figures, to be publised in SPIE Proceedings 10707-9
SOXS control electronics design
SOXS (Son Of X-Shooter) is a unique spectroscopic facility that will operate at the ESO New Technology Telescope (NTT) in La Silla from 2021 onward. The spectrograph will be able to cover simultaneously the UV-VIS and NIR bands exploiting two different arms and a Common Path feeding system. We present the design of the SOXS instrument control electronics. The electronics controls all the movements, alarms, cabinet temperatures, and electric interlocks of the instrument. We describe the main design concept. We decided to follow the ESO electronic design guidelines to minimize project time and risks and to simplify system maintenance. The design envisages Commercial Off-The-Shelf (COTS) industrial components (e.g. Beckhoff PLC and EtherCAT fieldbus modules) to obtain a modular design and to increase the overall reliability and maintainability. Preassembled industrial motorized stages are adopted allowing for high precision assembly standards and a high reliability. The electronics is kept off-board whenever possible to reduce thermal issues and instrument weight and to increase the accessibility for maintenance purpose. The instrument project went through the Preliminary Design Review in 2017 and is currently in Final Design Phase (with FDR in July 2018). This paper outlines the status of the work and is part of a series of contributions describing the SOXS design and properties after the instrument Preliminary Design Review
The mechanical design of SOXS for the NTT
SOXS (Son of X-shooter) is a wide band, medium resolution spectrograph for the ESO NTT with a first light expected in early 2021. The instrument will be composed by five semi-independent subsystems: a pre-slit Common Path (CP), an Acquisition Camera (AC), a Calibration Unit (CU), the NIR spectrograph, and the UV-VIS spectrograph. In this paper, we present the mechanical design of the subsystems, the kinematic mounts developed to simplify the final integration procedure and the maintenance. The concept of the CP and NIR optomechanical mounts developed for a simple pre- alignment procedure and for the thermal compensation of reflective and refractive elements will be shown