MCIS finished xenon development. MCIS is off and isolation valve is shut.
A new oxygen gas line is installed to microwave ion source via a hand valve neat PE.
Hand valve is tuned as a small leak so that the plasma can run with all other gas valves are shut.
However if one need to start the source Ne gas valves are needed to be opened.
A 3.13nA of 16O+2 is sitting at FC6 and ready to use as pilot beam.

Attached is the scheduled work for OLIS next week.

We spent most of the day looking at OLIS to find out why the "Ionizer Coil" keeps breaking down, we found the following:

1.  The FAN to cool R5 (ref: ISK4583D rev.7) a 25 Ohm 200W Resistor (2x50 ohm/100W ea.) was not ON, the nylon insulator (also the plastic tube across to the HV Terminal) was burnt and not holding the R5 resistor properly, I replaced the plastic insulator with a ceramic insulator.

Note that if the PE electrode is open it will charge up to the beam energy and start sparking.  Also I used a red heatshrink tubing to prevent the BNC connector (it sits at Common) to touch the Cu pipe for the Plasma electrode water cooling.

2.  Drawing for PE Polarity Switch: ISK4386D rev. 5

3.  Drawing for EE:SS BOP (resistors & spark gap): ISK4584D rev. 1

4.  Drawing for OLIS Surface & McroWave Source electrical diagram: ISK4583D rev. 7

Today Probe group (Scott K.) installed the OLIS Attenuator, they fixed the vacuum leak on Attenuator #2,  Marco M. asked them to remove Attenuator #1 because it is not needed and confusing for Ops;

Attenuator #1 was an experiment that Marco M. asked for, it was the same as Attenuator #2 but with 45 degrees offset, the results were not good and he decided to remove it.

I found these files about the MCIS in Geoff folders in M:\ISIS\Geoff-110715\OLIS\SuperNanogan

We did a test yesterday with the new Alga Microwave RF AMP, model # ALPA 50 Watt, serial # 130684 to be used for the MCIS.  We used the RF Generator from MISTIC and set the frequency to 13.80 Ghz, note that the RF Generator was/is  limited to 16DB maxiumum RF output.

The RF cable that we used was from the 200W RF AMP, it has a 20DB SMA attenuator at the Generator end, so we could only get about 25 Watts maximum output.

This entry was incorrectly added to the OLIS logbook.  it has been moved to the I3 logbook.

MCIS-

the cart was moved into the HV cage.  The facilities will be connected and an oven will be tested for the upcoming Se experiment.

Will take measurements for installation of key interlocks on cart power supplies.

SIS-

the filament assembly was removed for inspection.  When increasing the ionizer current it would work correctly until about 20 amps.  Then the current would stop (like an open cct).

MWS-

will prepare for Be later this week.

The remaining connections were done on the MCIS. 

A piece of 1/8" teflon was installed between the back of the sputtering tube/motor and the HV cage.

Ray confirmed the cart power supplies (heater and sputtering) Epics page readouts for Voltage and Current are okay.  The Heater p/s was left plugged into the cart receptacle.  The Sputtering p/s's are unplugged.

The MCIS:FC0 OUT limit was not actuating.  It was adjusted.

Keerthi tested the oven last night and was getting Se (14/10/24 it appeared to be Se, but the Prague magnet was not working.  Further investigation revealed it was not).  The oven supply is currently bypassed and ON.

Evigeny is working on the Alga and CPI amplifiers.  Both signal generators and the amplifiers are powered ON and connected.  Alga to the dummy load and CPI to the MCIS.

The ALGA amplifier and its signal generator have been turned off at the request of Controls.  They have had communication issues and are looking for any recent changes.

IOS mass scan if faulty. These is a manual scan from mass 3 to 4

Const22 = 0.04187  adjusted to mass = 4

A/q               FC6           X          Y 

3.0075        8.14e-8      398  237

3.1222        4.93e-10   398  237

3.2064        6.24e-7     398   237

3.2613        1.05e-9     408   237

3.3395        2.29e-10   408  237

3.4072        5.6e-10     408  237

3.5089        3.36e-8     408  237

3.5600        1.4e-10     408  237

3.6069        1.86-9       408  237

3.6436        8.46e-10  408  237

3.7514        4.02e-10  418   237

3.8387        4.37e-9    418   237

3.8883        3.43e-10  418   237

3.9416        1e-10       418    237

4                   1.1e-6     418    237       500  

A/Q            FC6

4                1.1e-6

4.25          8e-10

4.34          1.2e-9

4.42          5.5e-9

4.51          2.59e-9

4.58          1.7e-10

4.66          1.7e-10

4.74          1.7e-10

4.85          4.6e-10

5.0            1.36e-10

5.07          1.5e-10

5.13         2.69e-10

5.25         4.89e-10

5.33         9e-7

5.39        3.0e-10

5.56        3.3e-10

5.67        1.12e-9

5.7          5e-9

5.83       4e-10

5.92       2e-10

6.000     1.85e-7

A/q           FC6  (only current over 100pA)

6.0           1.85e-7

6.15         4.96e-10

6.23         2.4e-10

6.31         6.14e-10

6.39         2e-10

6.51         1.82e-9

6.90         2.7e-10

7.00         5e-8

7.1           4.6e-9

7.27        1e-10

7.5        3.32e-10

Today we replace the in-line resistors for the Plasma Electrode (PE) it was a 25 ohm 200W (2 x 50 Ohm 100W) with a 50 Ohm 200W (2 x 100 Ohm / 100W) also added the inductance coil.

This is R5 on drawing: ISK4583D rev. 10

This was done to reduce the power on R5

Note: We still need to make sure the the FAN is running to cool the resistors when the PE P/S is ON.

There has been no noticeable loss of communication to the ALGA 50watt amplifier.  As a test, the ethernet cable was removed for about a minute and then reconnected.  The amplifer re-established communication without issue.  This test was done twice.

Now, the CPI ethernet cable has been returned to the CPI amplifier.  The original ALGA ethernet cable (blue) has been reconnected to the ALGA.

PS  The nitrogen bottle has been replaced.

I updated the electrical Diagram  for OLIS Faraday Cage with 3 Ion Source, ref: ISK4586D rev. 2

PS:  Make sure that you do not connect both Bias P/S on same Ion Source ...

MCIS-

the Se was loaded into the oven last friday (21st).  During the weekend the presence of 76Se +11 to +15 was verified.

NOTE- the oven p/s on the cart is broken.  An attempt was made to remove it on friday.  It may be possible to remove, if the rack it is mounted on is loosened and turned.

SIS-

the Ionizer p/s control cable was removed to allow for local operation.  Keerthi tested the power supply in local mode on the weekend and found that the voltage did fluctuate.  This was confirmed by changes in the beam current.

Set-up pictures are located in -

M:\OLIS\OFF LINE ION SOURCE\SURFACE SOURCE\Single Source - Purchased Box\PICTURES\2014-11-21 Voltage Fluctuation setup

Ionizer Power supply + is connected to the common on the SIS source

Ionizer Power supply - is connected to the Ionizer on the SIS source

a cable is connected from the SIS main, bias plate to the negative terminal on the p/s.

141125_1159_OLIS_76Se+13.snap is saved in reference directory.

El=3480/4303V

MCIS:YCB1=110

MCIS:XCB1=190

MCIS:CCB1=300

Frequency = 14.44765GHz

Amplitude = -10.880

TET FP= 9.8W

TWT RP = 1.8W

The OLIS 1 week shutdown has been completed (WP 2015-04-13-1).

General-

Y-Box insulators were inspected and look good.  Beamline optics were inspected.

MWS-

The La disk was removed.  Source housing was cleaned and re-asssembled with a beaker installed. 

MCIS-

The cart was installed in the HV cage.  Kr gas pack was installed on the cart and the transfer tube was opened up to MCIS vacuum.

SIS-

Source PE and EE assembly was removed and opened up for inspection.  A new source was assembled (1/4 Ta tube and 0.040 Ta Oven & Ionizer wires) and installed.  Lithium Nitrate Anhydrous (ALFA #13405 TR#205938) was inserted in the oven.

Additional details-

M:\OLIS\OFF LINE ION SOURCE\DOCUMENTS\Shutdown Work

OLIS MWS is currently running an producing 22Ne2+

20Ne+2 beam optics saved as 150914_1117_ios0iosfc6.snap