1. Question 1) Are two ports current leads?

2. Question 2) With regard to Flow diagram
Dewar B
Dewar A
Is Dewar A equivalent to Dewar 1?
Is Dewar C equivalent to Dewar 2 which is valve box and gas-liquid separator?
Does Dewar B indicates water dump resistor?
Where is the current lead for detector?
Is Current lead independent of valve box (Dewar 2)? Would you tell us why the current lead is located independently with the valve box which has 4K liquid helium tank?
Dewar C
Dewar 1
Dewar 2
current lead?

3. Question 3) With regard to the structure of the flexible transfer tube
Question 3) With regard to the structure of the flexible transfer tube. I am interested in structure of the flexible type transfer tube? I suppose that structure of flexible transfer tube for your design may have following cross section by referring your flow diagram shown in the previous page.
Liquid Helium supply line (4.5K)
Gas Helium return reline (5K-?K)
vacuum
300K shell ( flexible tube )

4. Question 4) With regard to heat load of the flexible transfer tube
I am interested in the heat load of the flexible transfer line with multiple structure.
Would you tell us the heat load per unit meter (W/m) ? I’ m very sorry that I can not catch the heat load although you talked about it in a previous webex meeting.
Would you tell us the reliability for iterative process of bending of flexible transfer tube?
Generally speaking, flexible tube has limitation of iterative process.
And I suppose that we also have to pay attention to the reliability concerning not only flexible tube but also spacers etc.

5. Question 5) With regard to the helium return lines
Are following two suction lines surrounded by red circles independent of the return line in the flexible transfer tube?
Do you prepare flexible tubes for these two suction lines?
Do you also prepare the flexible tube for current lead helium gas line?
Are these suction lines converged one another?
Are these suction lines directly connected to the compressor suction or connected to the compressor suction via cold box return line?

6. Question 6) About refrigerator for QD0
I am interested in the cooling method of QD0.
QD0 has to be cooled by pressurized superfluid Helium of 1.8 K – 2.0 K.
Do you apply forced flow cooling or pool cooling of pressurized He II?
In the case of pool cooing system, I supposed we had better put the 2K refrigerator on the detector rather than on the platform.
2K refrigerator