Mounted four detectors on Carme ad well as four cable harnesses.

Cables for new, shorter harnesses appear still too long. Likely the model is not correct somehow.

One feedthrough flange was found to be damaged by an adaptor card. Tried to fix in vain. One pin is missing. Replaced with another.

Completed mounting harnesses and detectors.

The strain relief support for the bottom most two detectors on the feedthrough side was not mounted because we could not find enough MACOR parts and mounting flanges. We cannot find them in GSI, possibly they are somewhere not obvious in Edinburgh.

The strain relief on the detectors' side are still being manufactured.

We plan to test the detectors electrically from next week without moving the dolly. DR and OG to find a temporary mounting point for the manifold so that FEEs can be cooled in current configuration.

After discussions with Davide, changed the holes in the FEE holders for the bottom-right detector to slots in order to slightly change the angle that the FEE inserts into the flexi rigid PCB. This was sufficient, with some difficulties, to insert both FEEs into the flexi rigid.

Attempted to finally mount the last two fees, the top two for the bottom-right detector, which should have been very easy. Somehow managed to break one pin on each PCB in similar spots. One is in the third column (not in use), and one is in the fourth column (in use). This latter PCB connector was unfortunately dropped while trying to dismount it, and the ERNI connector cracked. That connector can be used anymore? Cannot find spares in GSI, must be in Edinburgh?

Dismounted all the hoses from the manifold, and starting to remove teflon from the plugs. Will use instead gaskets + anti-sieze compound. Quite a number of plug thread are damaged, likely in welding. Unclear if this was the reason behind the leaks. Should be done with the manifolds tomorrow.

14:50

Temperature, Statistics fine (see screenshots).

System wide checks fine (see below).

All FEEs pass clock check.

All FEEs pass White Rabbit check.

ADC Calibration check:

FEE64 module aida02 failed
FEE64 module aida16 failed
Calibration test result: Passed 14, Failed 2

If any modules fail calibration , check the clock status and open the FADC Align and Control browser page to rerun calibration for that module

FPGA timestamp error check:

         Base         Current         Difference
aida09 fault      0x1 :      0xa :      9  
FPGA Timestamp error counter test result: Passed 15, Failed 1
If any of these counts are reported as in error
The ASIC readout system has detected a timeslip.
That is the timestamp read from the time FIFO is not younger than the last

16:00 Slow comp thresh lowered to 100 keV in preparation for detector moving. Will have to test systematically what is the highest threshold we can accept

17:00 Temps fine. No overnight run.

The ERNI connector is not central on the adaptor boards causing misallignment with the FEE. 

The adaptor board is 80mm long. The ERNI connector is 50mm long. The connector is 13mm from the 2x Lemo side and 17mm from the 3x Lemo side. This results in misallignment between the FEE and adaptor board. 

To correct for misallignment, 2mm will be skimmed from one of the rails on the FEE. 

Skimming the rail allows the FEE to now be inserted straight into the adaptor board connector. Attached image shows test FEE holder on the bench. FEE needs to be carefully inserted to make sure it is straight as it can now move around within the FEE holder with the 2mm skimmed off the rails. For CARME, where sight lines and space are limited, one person is required to hold and push in the FEE whilst another checks the positioning of the connectors is straight. 

9:30

Ion pumps de-gassed by switching on and off multiple times. Large pressure increase the first time pumps were flashed, pressure recovers quickly once pumps off. Subsequent flashing of ion pumps showed a significantly smaller pressure increase, unitl little increase was seen. 

see http://web-docs.gsi.de/~lestinsk/vacplot.php

Pressure ~3E-8 mbar

10:00

Top NEG controller activated. This controller controls 6 NEG wafers connected in groups of two. NEG wafers connected in two's have the following settings which were utilised in Daresbury

Ramp Time = 45 minutes

Hold Time  = 60 minutes

Vmax =  100 V

Imax =  5A

Pmax = 400W

(See attachment 4)

Settings for the NEG wafers connected in a group of three (white tape on cable) in the moving detector chamber are the same as above but with Pmax = 600W. (See attachment 3)

Settings for the D2000's (kapton tape on cables) are the same used in Daresbury and are;

Ramp Time = 45 minutes

Hold Time  = 60 minutes

Vmax =  65 V

Imax =  3A

Pmax = 254W

Tmax = 500 C

(See attachment 1 and 2)

11:44 

Activation of first set of NEG's completed. The temperature of internal thermocouples went above 150C during activation so power to NEG elements was reduced during activation to 125W per module. NEG's fully OFF to allow internal temperatures to cool. Modules will be activated alone to try and find way of activating NEG's without high temperatures. 

Current bakeout temperature is 95C

Pressure ~ 8E-9 mbar

13:10

All NEG's off. Bakeout Temperature is 95C, internal temperature are ~102C.

Pressure  = 5.8E-10 mbar

Activating a single D2000 NEG pump as they contain in built thermocouples to gauge the effect on internal temperatures. 

14:53

Activation complete for single D2000 up to 500C. Most internal thermocouples remained <110C during activation with one going up to 140C. Temperature of internal thermocouples largely unaffected by the NEG activation untill above 400C NEG temperature. D2000 element will be maintained at 250C for activation of other elements. 

Internal temperatures fallen back to ~102C

Pressure <4E-10 mbar

Would recommend activating elements one at a time with a 20-30 minute ramp and limiting power for NEG modules to ~100W per module. 

1. ssh <user>@lxpool.gsi.de
2. ssh <user or carme>@atppc022.gsi.de
3. ssh pi@CARMEmotorspi (Standard npg password)