BMM construction photo journal

After some leak checking and driving the various actuators, it seems as though DM1 survived its tumble last week. Amazing!

DM1, installed in the A hutch	The guts of the filter assembly actuators	The guts of the cooled fluorescent sc reen actuator

The Bremsstrahlung shield stand is the next component after the monochromator. Before it was picked up from the floor after last week's delivery accident, the shielding parts were removed from the stand. What you see below is the shielding, sitting on a pellet jack, waiting from installation.

A new problem crops up. Notice below that the pink beam stop (the copper piece with the hole for the beam to pass through) is offset from the center of its flange. The flange was welded in place rotated by 180 degrees. The radiation safety bits are in the correct location, but the flange is offset in the wrong direction. This means that additional strain will be placed on the bellows connecting this to the monochromator.

The primary Bremsstrahlung shield is the thick, red-painted, lead block just below the beam pipe. The purpose of this component is to stop the high-energy gas Bremsstrahlung originating in the storage ring. Because we have an upward-deflecting mirror in the front-end, the pink synchrotron light enters the hutch above the primary Bremsstrahlung. Hence the primary Bremsstrahlung shield is below the X-ray beam path.

The copper bit is the pink beam stop. It's purpose is to stop the pink beam from t he front end mirror in the situation where the first monochromator crystal is, for some reason, removed from the beam. It is water-cooled – note the cooling line brazed into the copper and sticking out in the foreground.

The big red mass of lead is secondary Bremsstrahlung shield #2. The purpose of this is to catch Bremsstrahlung radiation which has scattered off of some component upstream, either in the A hutch or in the front end. Its large area is necessary to catch the full possible fan of such a scattering event.

The pink beam stop	The primary Brem shield and secondary Bram shield #2	The downstream exit of the Bremsstrahlung shield

On May 11, the first diagnostic module and the Bremsstrahlung shield stand were delivered, along with several crates of smaller kit. Unfortunately, the two large crates containing those components toppled over in the back of the delivery truck. Here is a photo journal of the work of the BNL riggers extracting that mess from the back of the delivery truck.

Today, the riggers came back to pick up all the components.

The front side of the Brem crate showing the center of gravity	The Brem shielding, removed from its stand	The riggers begin lifting DM1	Lifting …	More lifting …	Uh oh! The base is sliding along the floor…

The solution to having DM1 slide along the floor was very clever. The BNL riggers are awesome!

Use a second fork lift to lift from the other side	Up, up, up…	Getting there…	Almost up, pull, Jimmy, pull!	And up!	Whew!

The new mono plate allows the mono to be translated laterally between sets of Si(111) and Si(311) crystals.

I love the photo of M3. It looks like a real beamline!

Secondary Bremsstrahlung shield #1 (on DM1)	Lifting the new mono plate out of the crate	Laying the new plate on the granite plinth	Mirror M3, temporarily in place for cable fitting

These two shots show the ends of the transport pipe. Each end will be attached via bellows to the adjacent component.

Fluorescent screen, installed in end station	Shutter in FOE

M2 is our toroidal focusing mirror. M3 is a planar harmonic rejection mirror. DM2 is the diagnostic module between the mono and M2, it has a screen and slits.

M2, M3, DM2 as delivered	Preparing to lift M2	M2 hoisted	M3 hoisted	Lining them up	Lifting DM2

Ian begins work to replace the crystal cage. The mono has been removed from the hutch to allow space to install the first diagnostic module, which will arrive in a few days.

Beginning work	Disassembling

This stand supports a shielded box which holds an in-line ion pump. This, along with the pump on the fluorescent screen shown above, pumps out the transport line between the hutches.

The holes don't quite line up with the holes in the floor	Art the rigger is waiting to lift the shielded box	Ian drills out the holes on the stand's legs	More drilling

The box is then jockeyed into position on the stand. This thing weights a lot!

Positioning	Lifting	Getting there	Close	Just about!

The pump vessel and the secondary stand are now ready for the transport pipe. The red-painted parts are lead, the blue are steel.

Empty shielded box.	Secondary stand

This is a 6-inch steel tube with lead shielding wrapped around it. It weights about 370 kg/800 pounds.

Remove the trasport from the shipping container	Carrying	Lifting

At this point, I had to run away to make a presentation about BMM to the Radiation Safety Committee. When I returned, the transport pipe was in place.

Transport pipe protruding into the end station	Pipe resting on a collette in the shielded box	Ian and Beau work on attaching the lead collers to pipe	It was a difficult job

In these photos, M1 is open with the vessel lid supported by rods so that the optic can be installed.

M1 from upstream	M1 from the inboard side	M1 from downstream

DM1 is ready to ship. Current from the photo diode in M1 was demonstrated while I was there. DM3 is complete and ready for bake-out. DM7 needs alignment before bake.

DM1	DM1	DM3	DM7	unassembled diagnostic modules