The MOONS cryostat has arrived in Edinburgh – and it’s big. This is a key milestone for the project and allows much of the major assembly to really get under way. MOONS will be unique in providing wavelength coverage out to 1.8 microns, with a high multiplex. But this comes at a cost: to work … Continue reading Blue MOONS
HR-H silicon prisms in the house
A new milestone towards the MOONS completion has been achieved with the manufacturing and delivery of the high-resolution H-band silicon prisms. These large optical components, considered one of the main challenges of the instrument design due to their size and surface quality requirements, were designed by the INAF team in Arcetri, Florence. After a lengthy … Continue reading HR-H silicon prisms in the house
First FPU delivery
The first box of production FPUs finally arrived this week! These will be inspected, then tested on the automated verification rig and compared against the factory end-of-line report. Assuming they all perform as well as expected, subsequent batches will begin to roll in quickly. Installation onto the baseplate won't commence until fibres are delivered and … Continue reading First FPU delivery
Collimation
MOONS recently took delivery of two of the largest optical components in the instrument: the main collimator mirrors for each spectrograph manufactured by KiwiStar Optics in New Zealand. Last week a team from Arcetri Observatory, Florence came to Edinburgh to install these two large optics within the not-insignificantly sized mounting structures that they had designed for … Continue reading Collimation
Mounting mighty lenses
The first set of optics for a MOONS camera have been delivered and successfully mounted into their housings. The six near-identical cameras in the MOONS spectrograph all use the same innovative optical design, more information on which can be found here. This first set of optics is for one of the two YJ-band cameras. Five … Continue reading Mounting mighty lenses
Ready to split the beam
This week MOONS has taken delivery of its first major optical components, the RI band dichroics. Each of the two MOONS spectrographs has three different spectral channels; light is split into these channels through two dichroics. The dichroics received are the first ones in the beam, which reflect the short wavelength radiation into the RI … Continue reading Ready to split the beam
Progress on the MOONS cameras
A major assembly test has been successfully carried out for the MOONS cameras. The main mechanical structure for the MOONS cameras is being built and tested in Cambridge, but the structure to support and focus the camera detectors is being built in Edinburgh. For the first time these two complex assemblies have been joined together … Continue reading Progress on the MOONS cameras
Radiation shield fills the lab
MOONS has just taken delivery of by far and away the largest component we have received so far: the radiation shield. This colossal* structure will line the inside of the instrument's cryostat, forming the final barrier between the warm outside world and the chilled world inside MOONS, which will operate at around 130 K. The radiation … Continue reading Radiation shield fills the lab
Testing the electronics
We have received (and tested) the first batch of circuit boards for the FPUs. Each FPU requires two circuit boards; the main drive electronics that attach to the base of the FPU and a smaller board that is mounted on the alpha stage of the FPU and relays signals from the motor and switches on … Continue reading Testing the electronics
