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27 September 2021

Accelerator

Normal Conducting Linac (NCL)

Preparations for beam commissioning, scheduled to start in October, continues. Chopper tests for the Medium Energy Beam Transport (MEBT) section are completed. The Radio-Frequency Quadrupole (RFQ) is ready for beam. A hydrogen permit was granted for the Ion Source and the system is now subject to tests. 
Drift Tube Linac (DTL) tank 1 is installed, and couplers have been mounted. Cooling has been connected and leak tests are performed. RF conditioning of DTL1 will follow once the beam commissioning activities are completed. The DTL water skid in FEB 100 still remains to be reassembled with updated reconfiguration. In the DTL workshop, installation of copper parts and connection of tuned modules for the DTL tanks is ongoing.

Linac Warm Units

A clean room is in place for preparation of the Linac Warm Units (LWUs), enabling a particle-free installation. The purpose of a particle-free environment during installation is to minimise contamination of the inner surfaces of the beam transport piping and cryomodules. Right now the cryomodules are substituted by a dummy pipe. 31 LWUs are already in place in the tunnel, with three more units arriving shortly. In total, there will be 59 LWUs.

Spoke Linac

The end box for the spoke cryogenic distribution system is in place in the tunnel. The helium supply, used to cool down the cavities of all cryomodules, will flow to the end box where it is reversed and returned to the cryoplant via a helium collector pipe already installed. 
All spoke valve boxes are in place, but connection of header units in-between the valve boxes remains.

Cryomodule testing

The second serial-produced medium beta cryomodule (CM03) is now inside the test stand bunker and is being connected to the equipment for cooling and power tests to start shortly.

RF power stations

Two RF power stations for the spoke section have now been tested in cell 120 of the Gallery building, with the third in line just started its test cycle. These tests are performed with the power going to a local dump, and is not yet involving the RF distribution system.

Target

Monolith – Port Tubes

This week the first neutron beam port tubes were lifted down from the high bay to the R6 area surrounding the Monolith vessel. Port tubes are rectangular-shaped ducts which will serve as housing for the first few metres of neutron beam instrumentation to be inserted here. 39 port tubes will be welded to the Monolith vessel, starting in October.

Active Cell

Assembly of the floor valves from high bay to the Active Cells continues, with site acceptance test planned for mid-October.
Installation of the upper intrabay door continues between the process and maintenance cells. This folding shielding door weights approximately 58 tonnes.

Target roof

Mounting of aluminium lamellas on the Target roof steel structure continues. West areas protruding over the D08 lab, the Target Entrance building and Transport Hall are substantially completed with only special panels in joints and connecting areas remaining.

A2T facades

Metal panels are mounted for the facades of the A2T building, with a view to have all facades in place by the end of this month. Cladding of the cantilever roof will follow on this side of the Target building.

Experimental Halls

Neutron shielding bunker

Mounting of the side wall shielding blocks for the west sector bunker inside Experimental Hall 2 started this week.
Reinforcement of the bunker crane runways are in progress.  The modified cranes are in preparation at the manufacturer in Norway, and will be installed on site before the end of the year.

Access to instrument caves

Steel bridge walkways are in place along the internal walls of the two short instrument halls. Once beamlines, caves, control hutches and all associated equipment for the instruments are installed, most of the floor space pf these large halls will be occupied. To reach the instruments, stairs and bridges will be constructed across the rooms.

Beamline Gallery

Rows of lower shielding blocks have been put in place for the beamlines for instruments CSPEC and BIFROST.

Siteplan Archive
D01 hall

Experimental Hall 1 covers 8,000 m2. Gangways along the walls will provide access to stairs and brdiges to the future instrument caves.

 

 

D02 A2T facades

Facade panel installation for the A2T building is in the final stage.

D02 high bay AC

View of the Active Cell intrabay area from high bay level.

D02 high bay floor valves

Installation of floor valves from high bay to the Active Cells in progress.

D02 sombrero over D08

Mounting of aluminium lamellas on the Target roof steel structure are nearing completion in the west areas protruding over the D08 lab, the Target Entrance building and Transport Hall.

D02 TH sombrero

Cladding of the Target roof over Transport Hall, where only special panels in joints and connecting areas remain.

D03 west bunker side wall

Mounting of the side wall shielding blocks for the west sector bunker inside Experimental Hall 2 has started.

E02 BIFROST beamline to bunker

Rows of lower shielding blocks have been put in place for the beamlines for CSPEC and BIFROST.

G01 DTL-1 cooling tests

Cooling tests are ongoing for DTL tank 1 in the Normal Conducting Linac (NCL).

G01 LWU clean room

Dummy pipe going into the LWU clean room, where particle-free installation is enabled.

G01 NCL

Overview of the NCL area.

G01 spokes CDS end box

End box in the Spoke Linac: this is where the cryo distribution system ends and helium is reversed back to the cryo building.

D02 Monolith port tube

The first port tube in place on the Monolith base slab.

D02 port tube from high bay

Port tubes were lowered from the high bay to the Monolith area.

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