Lau and Niels NA62 TD meeting 17 March 2014 Outline Complete the crane consolidation in TCC8 Reinstall frontend after alignment checks Consolidation of T10 target Close up roof shield above front ID: 479561
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Slide1
Forthcoming work on the beam
Lau and Niels, NA62 TD meeting, 17 March 2014Slide2
Outline
Complete the crane consolidation in TCC8
Reinstall front-end after alignment checks
Consolidation of T10 target
Close
up roof shield above front
end of beam
New location for fast valve, move 2
magnets
Double separation wall
Temporary modifications to ventilation system
Prepare final ventilation system renovation
Complete vacuum
All the rest
…..Slide3
Crane consolidation
The mechanical work on the TCC8
crane has been completed.Still some remaining work on the
electrical distribution.
The crane delivery is foreseen for
end March (possibly March 18
th
).The new crane has no ‘guirlande’, but is powered via a rail.This makes the air separation between TCC8 and ECN3 much easier.Quite some work depends on the availability / reliability of the TCC8 crane!Slide4
Reinstall beam front end
Due to asymmetric profiles and
slightly low kaon rate, the
alignment
of the beam front end
has been verified in detail.
This included an insert in T10.This required dismantling of the roof shield and of the TCX dump and of the first QNR quadrupole.Also one MTR dipole in next tothe TAX had to be turned by 180o. The TCX and magnets have to be reinstalled, as soon as the crane
is availableSlide5Slide6
Contrôle 3D (AT401).
T10 insert
At some stage
…..
Now
Ecart Alti. : +0.16mm
Ecart radial: -0.25mm (coté Salève)Slide7
QNR
TCX
Both are self-aligning
Reinstallation as soon as
the
TCC8 crane is available againSlide8
T10 target consolidation
All the mechanical parts of the T10 target will be replaced
Specification in EDMS document 1267311The shielding itself will be preserved
Replace target box with identical spare
Different target materials were studied, but stay with Beryllium
Replace the T10 collimator
The TBIU unit will be replaced with a new box, containing
- a BSI (Titanium foil for intensity measurement) - Two BSPH, two BSPV (split foils) - BBSH and BBSV (SEMP profile scanners) - Two halo foils with slits of 145x2.5 mm (one horizontal, one vertical)
All this will be properly aligned and testedSlide9
Close roof shield
Once the alignment of T10 and the from end is done, the roof shield will be completedSlide10
Fast valve relocation
Now that we have agreed to install only one fast valve, it was deemed to install it as far downstream as possible, i.e. just upstream of GTK3.
The 32 cm of longitudinal space required implied a displacement of the two last achromat-2 magnets by 32 cm.
The magnets
will be reinstalled
soon (requires
TCC8 crane).Slide11
Double separation wall
The order has been placed with
Sarvadon
. Also a separation will be made in GHN300Slide12
Ventilation system for 2014
With the double separation wall in place, the air separation between ECN3 and TCC8 should be OK, apart from leaks between the ventilation units.
CV will take care of the pressurization of the double wall.
Therefore we will STOP the ventilation in TCC8 in the technical run at the level of the double wall with dampers. This should rather efficiently stop the
air flow from TCC8 into ECN3.
With those measures the operation of the ventilation system should be
close to the final version, apart from the bad shape of the ventilation units.Slide13
Ventilation system for 2015+
The study of the final ventilation system is in progress.
Information will be made available on EDMS doc 1354745.
Installation is foreseen during the first half of 2015, before the start of the 2015 physics run.Slide14
Remaining work on vacuum system
The beam line vacuum remains to be remounted and leak tested, following the various modifications.
The control is being implemented by the vacuum group
The expansion vessel next to the RICH remains to be connected.
T
he blue tank vacuum is on track. The planning for commissioning is tight due to late closing of the tank (detector arrival) and one should be aware that commissioning can take more time e.g. in case of leaks. As discussed before.
It is important to close the tank as early as possible
.Planning:Pumping test for K12, leak test, final test of control system (probably) fits with NA62’s proposed vacuum test in July - August 2014. Performed jointly by EN/MEF and TE/VSC (knowledge transfer).
Final test with full gas load = pumping before & during physics run.Will be
executed
by EN/MEF,
but
under the expert eye of TE/VSC.Slide15
Other issues
The GL vs
I curve of QNL magnets will be measured and parameterised.This should lead to an even better understanding of the optics of P42 (and K12).
We have also a better understanding of the gradients in QNR magnets.
Understand / confirm orientation (H/V) of 4-jaw
collimators.
Consolidation and realignment of T4 target (late Summer).
Replace 200 mm head by a 180 mm head (slightly better for T10 flux).The gas extraction and the H2 infrastructure must be installed → see next slideThe RP monitoring system will be completed.Minor improvements to the side shielding of the K12 TAX.Install a fence at
the entrance to the dump tunnel.Cesar upgrade, details still to be finalised.Not discussed here: infrastructure not directly related to beam (rack cooling,
etc
)Slide16Slide17
To be updated after crane renovation in TCC8
TCC8 & ECN3 planning SBA (January)Slide18
L.Gatignon, SPSC112, 14-01-2014
Experimental Area Status
18