Real components are coming in…

rail GALIL

 

 

 

 

 

 

 

At the moment components for our prototype are coming in. We are working on the alignment of the rail system that guides the magents up and down the beamline. An other team is working on electronic motion control of this movement. We have one full ISIS motion control system (thank you Steven!) to play with…great fun!!!

 

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Prototype guide field coil.

guide coil Following the previous post about guide field calculations, here we have a prototype of the new guide coil design. We will have special custom extruded Al profile with ITEM profile on the inside, protection plate connection on outside, room for Cu cooling tube, 3D printed corners to reduce price and have smooth wire feed-in/out.

This prototype was tested up to 10 A and 100 Watt (approx. 80 ‘C), no cooling.

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Guide the precession…

Guide field 3DGuide field - Field strength along centre

 

 

 

 

 

Simulations have been done for many configurations of the coils that guide the precession through the instrument. For the SESANS mode these coils need to be in a magnetic balance for the full beam cross section. This is not trivial because of all the spacial restrictions in the instrument. On the left one can see the SESANS configuration (all coils in line) with a coil for the first arm, sample position and second arm. On the right one can see the magnetic field on the central axis of the instrument. Below a colorful plot of this field for the full setup.

Guide field - Field map top view

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Magnetic field simulations together with ISIS

Plot 80 degreesPlot 20 degrees

 

 

 

 

 

Together with Tomas M. from ISIS we have been looking for the optimal setting of our split magnets. Depending on the encoding angle (plot 1=80 deg, plot 2=20 deg) we need a certain shift of the pole shoes. Michel T. is digging through all the simulation data to find the perfect setting. Conclusion: it will probably work fine…

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Wooden parts of LARMOR @Delft

setup03 setup02

 

To avoid any errors in our design and to get all the cables at the right length we made a wooden copy of the most important ISIS hardware on the two LARMOR tables. The next step is the Delft magnets and motion control and then we can practice the transfer from SANS to SESANS…

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RF aplifiersFour meters of brute power…

The RF AR-800 amplifiers are ready for testing…

If they pass the test we can already ship two pieces to ISIS for installation and test if it will add noise to the detector for example.

 

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LARMOR tables in Delft

Installation of the Delft equipment on the LARMOR instrument at ISIS needs to be plug and play. To be sure this will be a smooth installation we have now the exact same tables. With this we can even practice the alignment procedure of the magnets and check what is the best way to run all the cables. One striking point…LARMOR tables are massive, next challenge is to find the space to put these in line…

Delft_version1 Delft_version2 Delft_version3

 

 

 

 

 

 

 

The first picture shows the two tables with our 3D printed scaled model on top. The second picture shows the first table. We have added side support, at ISIS this table is bolted to the ground. Third picture shows the table that will hold the detector/SANS vessel and our magnets. The strips support the reference plane that will hold our translation stages.

 

 

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Visit Delft team to Larmor

IMAG0084

Rob Dalgliesh from ISIS shows to Chris Duif and Jurrian Bakker from Delft the sample position at Larmor just before the first neutrons will arrive.  On the left you can see the position sensitive detector.

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First neutrons on LARMOR

Yesterday we received very good news from the UK. The first neutrons have been detected by the LARMOR instrument!!!!!!!

Click this link to read the official news on the ISIS website!

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LARMOR post sample vessel tested

LARMORVESSELToday we visited the company Schelde Exotech situated in Vlissingen (NED). This company produced the vessel that will be used in the SANS mode. Today the leak rate test is performed and it will be shipped to ISIS soon for installation.

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