Cryostat for AMoRE-10 (Contracted & manufacturing) Cryogen-free Dilution Refrigerator for AMoRE...

Current status of AMoRE-10 cryostat

Cryostat for AMoRE-10 (Contracted & manufac-turing)

Cryogen-free Dilution Refrigerator for AMoRE 10

-Pulse Tube based CFDR

Leiden Cryogenics

-Model : CF-1200-Maglev

-Minimum Temperature : <10 mK

-Cooling-power : 1.4 mW at 120 mK

-Cool-down time : ~ 20 hours with LN2 precool-ing without any extra load

Contract informations

-December, 23, 2013

-Price : 420,000 euro

-Delivery : shipped within September, 26, 2014 -Delay penalty : 630 euro/day, Max. 10%

Experimental space of AMoRE 10 cryostat

5 layers, 7 columns

Single LTD cell

35 CMO crystal (10 kg)

AMoRE 10

70 mm

60 mm

Outer-most dimensionIncluding Cu holder

550 mmM. C. bottom to 50 mKshield top

408 mm

- Cu shield, lead blocks, and S/C

shield inside the M. C.Installation : possible, but tight

CMO crystal, 2 MMC, 2 SQUID, and copper holder.

Arrangement of cells

35 single cells are installed on the mounting unit

Arrangement of single cells

Mounting unit is surrounded with the superconducting shield

Under developing of proto-type

string

-Shape of single cell

present will be tested

SCshiel

d

Superconducting shield including mounting unit will be supported by stringString type loading : vibration and thermal connection of M.C. plateMount-

ing unit

Lead shield in the MXC

-700 Kg Lead shield in M. C.

Cool-down time to base temper-atureExpectation : 1 week with LN2 pre-

cooling

Customization

100 kg lead shield in M. C.

Lead bricks will be installed at the bottom of the M.C. plate

-Materials (IVC can, OVC can, thermal shield, etc)IVC can & thermal shields : high purity copper internal radiation IVC can : fabricating (welding) so diffi-cult Dr. Li-Jin is searching proper com-pany

Leadbricks

Additional Lead bricks for sur-roundingdetectors : under discussion

Each temperature plate : OFE grade copper under discus-sion

Lead shield inside the refriger-ator

Activation by the air transport (for reducing de-livery time)

Activation during the air transport

Copper of Aurubis com-pany The copper components in the AMoRe10 refrigerator are made with this test block 1 : delivered by airplane (10 × 10 × 3 cm, 2.44 kg) will arrive Y2L by tomor-row

- Using a Ge detector of Y2L, Dr. J. H. So will measure and compare the activation degree of two test blocks delivered by airplane and ship- Based on the result, the transportation way of AMoRE 10 re-frigerator will be decided.

test block 2 : shipped (03/ 03/ 2014)

(10 × 10 × 3 cm, 2.44 kg) coming soon

Loading a cryostat

Base frame for CFDR loading

Lead shield

CFDR

Solid enough to load our system safety evaluation

Thickness of lead shield100 mm 150 mm

Loading a cryostat

All lead shields are designed that it can be move for the experimental space 1.5 m experimental space Person have to do a work on the

base-frame : two persons possi-ble

move

A5 Lab in the Y2L

The maximum height of LTD Lab : 3.7 m

270 mm space between ceiling and the top of the lead shield

Muon veto or other stuffs have to be set between

the 270 mm space. Very tight

Additional refrigerator : under contacting will be ordered early or middle June

Arrangement in A5 Lab

office

LTD

AMoRE-10Fridge

Addi-tionalFridge

AMoRE-10 refrigerator : will arrive at middle or late October 2014

193 mm

65 mm

193 mm

90 mm

E-rackPump

station

Refrigera-tor

Detec-tor

Refrigerator, E-rack, pumping station, and compressor : 2 set

Electrical power, coolant flux : deter-mined

Exhaust, air conditioning, and arrangement : more discussion

All of construction : depends on “”””“ Dr. K. S. Park ”””””

Arrangement in A5 Lab