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** gun - carlos/jessica/marcy<br /> ** degrader - marcy<br />

...b4&share=EdK4-xqvVeZBh4nTSBUclQEBYc5G0wknVAWXqmSTSVL3kw Sharepoint link to Marcy's Gun/2I/Y jobs]

[[media:Marcy's evaluation of activation energy_summary of many test chambers including t

January 11, 2016 - Small Group meeting regarding fitting functions: Tim, Dan, Marcy 2. Marcy: [[File:Pade_AvsR.pdf]] Pade functions for asym vs. rate

* Marcy's update on the vacuum chamber

* Marcy + tentative microMott schedule * Carlos, Marcy, Riad, Shukui, Matt

;Marcy, viewer marks for measurements [[media:viewscreens_Aug2019.docx]]

January 7, 2016 - Small Group meeting regarding fitting functions: Tim, Dan, Marcy 2. Marcy: Looking at fitting parameters [[Media:Dunning-Gay-fit-functions.pptx]]

==(Marcy/Mamun) Run 1 target thickness==

: Interaction vacuum - Marcy : Marcy - show/describe options for how NEG's might be mounted [[media:UHV1400Mount

Marcy: [[File:Pade_run_2.pdf]]

* Marcy: Asym vs. Rate, text on Pade [[File:fitting.docx]] * Marcy look at Marty's presentation [[File:24Feb2016.xlsx]]

* Marcy/Carlos/Phil - Status of gun jobs (gun bake, NEG coating, alignment fixture, * Marcy - test YAG resistance

* Marcy - select gold targets * Joe/Marcy - get existing tunnel camera framed with central beam pixel on old ladder a

#Marcy

...UBgR_iWPHI2jAfsc9wJE00oQ?e=Wmp1Mr&CID=9ace3d4c-3c26-a771-e9b4-3e5d57e60bc9 Marcy's Gantt]] * 4/17 - 5/1: Marcy

* Marcy: functional form dependence on Mott fitting [[File:Pade_22Jan2016.pdf]]

[[media:marcy retreat discussion.pptx]]

* Marcy, draft tech note extrapolation: [[media:Extrapolation6Feb2017.docx]]

=== Phil/Marcy discussed count of components needs in MeV section, good news relatively li

*NEG ZAO modules have been installed and wired by Marcy Stutzman ...o ensure there are no leaks, and that the NEG modules are not shorted out. Marcy installed an extractor gauge for vacuum monitoring after bake.

...vs. energy for H2, CH4, and CO. These were weighted by gas pressures from Marcy's presentation last week.

#Marcy

: Marcy - Fitting update [[media:24Feb2017ExtrapolationUpdate_v2.pdf]] : Marcy - target ladder

#**4 10 kV SHV feedthroughs. (Marcy, do we have these?, how many?) #*Marcy dimension requests [[media:screens18gun.pptx]]

* (Marcy) Remake A2 joint * (Marcy) Replace harp

== Marcy/Phil - plans for the Y-chamber (NEG coating, NEG flange, IP, window) ==

Attendees : Carlos, Mamun, Marcy, Riad, Joe * Marcy - list any UITF gun and beam line jobs or repairs to make photocathodes rel

* Marcy's MolFlow TN - writing?

Marcy: Travel 17-22

; Marcy (5 min) - Vacuum beam line status (viewers, apertures, pumping) and post-ba ; Reza, Alica, Marcy, Yan, Dennis (30 min) - Beam commissioning plans: [[media:BeamINJphase1v4.p

#*Marcy, Joe mentioned installing this flange in the injector was a challenge: the #*Marcy, what are your conclusions on the HV chamber vacuum?

; Marcy - mini-Mott recovery plan

Marcy [[File:Fitting_Function_dependence.pdf]]

...grounded + flat & tilted + Gabriel will try electrostatic model with slots Marcy recommends for conductance # Marcy blow off new NEGs, install w/o ground screen, add NEG wiring, gauge, blank

* AVS Symposium, Charlotte NC, October 24-29 (Marcy) * Photocathode Physics for Photoinjectors, SLAC, November 10-12, 2021 (Marcy, Carlos, Riad, Mamun)

At today's meeting Marcy summarizes the measurements and her analysis. We'll discuss what is neede

* Marcy - On-call report * AVS Symposium, Charlotte NC, October 24-29 (Marcy)

**Marcy - Description of vacuum - Molflow simulations and ion pumps

# Update by Marcy on Degrader installation

* AVS Symposium, Charlotte NC, October 24-29 (Marcy) * Photocathode Physics for Photoinjectors, SLAC, November 10-12, 2021 (Marcy, Carlos, Riad, Mamun)

== Friday, October 23 SWING (Tim, Marcy) == Started shift with white board tool-box meeting (Tim, Daniel, Matt, Marcy, Riad, Joe). The look up [https://logbooks.jlab.org/entry/3355838 table] o

#* It is awaiting vacuum degassing at 400 C for as long as possible (Marcy? Phil?) #* Marcy, could you please check with ohm-meter to make sure screen is not shorting

* [[8/27/21 - JLab-Euclid meeting]] - Marcy presents results of summer beam tests on diamond targets

## NEG screens: what is needed to finalize the design? Marcy, Shaun

* Diamond Mott beam test #1, how do we analyze data, Riad or Marcy analysis training? Phil, rebuild 3" spool/nipple? * UITF schedule meeting just after 1:30 today...Shukui, Carlos, Max, Marcy, Phil

* Marcy - remaining vacuum tasks, harp done?, chopper valve/bake region ...IMEKO TC16 7th International Conference on Pressure and Vacuum Metrology (Marcy)

* Matt's PV - graphics from Joe Wien, Marcy Molflow, Riad PV * Marcy mini-Mott

* Marcy or Mamun - Jobs when venting Prep chamber

**Two simulations used a constant H2 density of 10^17 and two used Marcy's H2 density profile for CEBAF from Molflow.

* AVS Symposium, Charlotte NC, October 24-29 (Marcy) * Photocathode Physics for Photoinjectors, SLAC, November 10-12, 2021 (Marcy, Carlos, Riad, Mamun)

* Photocathode Physics for Photoinjectors, SLAC, November 10-12, 2021 (Marcy, Carlos, ...) ; Status on partner projects - next week when Marcy is back in town

* Marcy - select gold targets * Marcy - any tech note on thickness, statistics, target and beam scans?

* Carlos/Marcy - working mostly on UITF beam line (gun & depo)

** Marcy, Riad, Joe - Writing TN on the Mott chamber assembly [[media:MottConstructi # (Tim, Marcy, Dan) Complete experimental asymmetry vs. target thickness for Runs I/II; s

* Marcy/Phil gun chamber vacuum work : NEG coat, when 1400's arrive, ports assigned

* NEG screens - Marcy ** Marcy to meet with Shaun

...the wire option for the anode and tube. We'll use 1 mm thick Cu wire that Marcy has used before, adding a strain relief. #*Weaved wire mesh that Marcy prefers: 0.88 mm wire diameter, 0.5 inch square opening is in Bubba's offic

2. Marcy - Target thickness and extrapolation method [[Media:FESEM_uncertainty_effec

#Marcy will work with Danny to select and finalize two kapton coated K type thermo

* When Phase II vac/HV jobs ramp down - test UCSB/RIT samples @ UITF? (Phil, Marcy, Jessica, Carlos, Mamun) ...IMEKO TC16 7th International Conference on Pressure and Vacuum Metrology (Marcy)

4. Time permitting: Marcy - summary of thickness uncertainties, dependence of Ao on fitting function

Marcy - Target thickness

Marcy: [[File:Marcy_15March2016.pdf]]

Both Dan and Marcy are making great progress respectively on the analysis and target thickness

:(Marcy/Tim/Riad) Status of fitting asymmetry vs. thickness and rate:corrected vers :(Joe/Marcy/Riad) Technical Description of the CEBAF Mott Polarimeter and Detector Chai

1. Marcy - update on target thickness

* Marcy/Bubba/Phil - path forward on vacuum chamber modification/assembly

*Marcy/Carlos - sent drawings of the CEBAF photogun & anode

* 200 kV gun job at UITF (Marcy, Jessica, Phil, Carlos), * Update on the R&D in GTS (Gabriel) and TL1137 (Mamun, Marcy),

* Marcy's Gantt chart goes here => https://jeffersonlab-my.sharepoint.com/:x:/g/per

1 Viewer assembly fixture => Marcy, do you really need this, or skip? 2 Will NEG fit 25 l/sec IP on Y => Marcy, do you need any help?

#*Marcy has 3 of the 10 kV SHV feedthroughs. #*Bubba ordered more weaved wire mesh that Marcy prefers: 0.88 mm wire diameter, 0.5 inch square opening

#Marcy (QE scan)

#Marcy, find the y-chamber in UITF, have it degassed, recommend a pump configurati #Marcy investigate precision linear vacuum actuators...are there other options to

...h - H2, CH4, CO - cross-sections vs. energy, and weighted by gas densities Marcy showed last week [[:File:ICSPlot_H2CH4CO.png | ICS vs Beam Energy]], [[:Fil

== Friday, October 23 SWING (Tim, Marcy) == Started shift with white board tool-box meeting (Tim, Daniel, Matt, Marcy, Riad, Joe). The look up [https://logbooks.jlab.org/entry/3355838 table] o

...roup Leader), Steve Covert, Phil Adderley, Riad Suleiman, John Hansknecht, Marcy Stutzman, Joe Grames.]]

# Mamun/Marcy - status of sibling target thickness measurements

*Marcy will use MolFlo to estimate the vacuum isolation of each dif pump design, a *Next meeting should include Phil, Marcy, Alicia, Yan and Reza. Matt will distribute the drawings I get from Gary.

Present: Alicia, Reza and Yan, Marcy and Joe, Gary, Shaun and Danny, and Lakshmi

...the status of the theory input and Xavier should be able to join too. If Marcy is ready we'll have a first peek at the complete target thickness measureme

...the status of the theory input and Xavier should be able to join too. If Marcy is ready we'll have a first peek at the complete target thickness measureme

* Cat 2 PPE gear ordered for Joe, Bubba, Carlos, Marcy, Riad => pick-up on Thursday (otherwise 2 week delivery time)

* Marcy

#Phi/Marcy, can you confirm Danny's parts list, set them aside when found? '''=> Phil, #Marcy, can you look at heating blankets for this geometry, good idea? '''=> come

* CEBAF "200 kV" jobs (Marcy's vacuum "hook-ups", Carlos' HV Conditioning TOSP, Phil's plans for the har

# Marcy, Tim, Daniel, ...

**Description: Marcy sent vacuum simulation data for H2 and CO for the CEBAF photogun through th

From Marcy - We have decided that we would like to install a new manipulator to replac From Marcy - Those are the uitf ones from the FEL - are we looking for the ones we use

: (MARCY) After all of the above are done, pursue your "prediction" studies, e.g., : (MARCY) - target ladder

** 4/17 - 5/1: Marcy * Marcy's schedule...

* 9/15/2021 Marcy options for how NEG's might be mounted [[media:UHV1400MountV2.pptx]]

...t thickness - Mamun completed various measurements of the Run 1 siblings. Marcy has been analyzing the FESEM images, organizing the metrics and will presen

* Marcy presented vacuum simulations of the CEBAF photogun and beamline. These simu

* Photocathode Physics for Photoinjectors, SLAC, November 10-12, 2021 (Marcy, Carlos, Riad, Mamun)

* Marcy checking on top hat configuration for Y-chamber [[media:200326_viewer shiel * Marcy get quotes on A1/A2 cubes and 6-way cross w/ R-R

6. Marcy/Shukui/Joe - Characterization tests of GaAs/GaAsP, DBR, Sb-cathode

* Marcy

*Marcy presented graphs of outgassing - i.e. where do ions/gas go once formed? Do

* Marcy is checking on metallized YAG screen w/ hole

* Joe - do we have all ion pumps and valves per model? => '''Marcy's first pass, but needs to see model again''' [[media:200320_ion pumps and

* Photocathode Physics for Photoinjectors, SLAC, November 10-12, 2021 (Marcy, Carlos, Riad, Mamun)

'''[[Marcy Stutzman]]''' x7073

*a note to phil and marcy, on the real assembly work, the bottom and right side of the cube are no pr

* Marcy

1) Benefits of NEG coating, toward achieving XHV (POC, Marcy) 2) Potential benefits of cryopumping toward achieving XHV (POCs, Marcy, Anahi)

:Review Marcy/Daniel survey of injector IP power supplies [[media:190220_IP_Summary.xlsx]

[[Media:FE-SEM_first_results.pdf]]==(Mamun/Marcy) Update on target thickness measurements==

6) Fit-a-thon begins (Riad=Root, Marcy=Mathematica) applying Pade and Marty functions

# (Daniel, Riad, Tim, Marcy) Corroborate the Lebow and FESEM measurements with foil rate measurements t

6) (STARTED) Fit-a-thon begins (Riad=Root, Marcy=Mathematica) applying Pade and Marty functions

* vacuum chamber w/ small bread board => '''Marcy/Phil located ready in 1137'''

#Marcy, find the y-chamber in UITF, have it degassed, recommend a pump configurati #Marcy investigate precision linear vacuum actuators...are there other options to

6) (WORKING) Fit-a-thon begins (Riad=Root, Marcy=Mathematica) applying Pade and Marty functions [[media:AoExtrapolation23Jan

* Marcy - From last's meeting's post => [[media:21Feb2020Vacuum.xlsx]]

** (Tim, Marcy, Dan) Complete experimental asymmetry vs. target thickness for Runs I/II; s

* Marcy is checking on metallized YAG screen w/ hole => ?

** Marcy's final list [[media:210209_ion pump names.xlsx]]

...took additional measurements; discussed preliminary action plan with Joe.G/Marcy and Phil. :Was put on hold yesterday ( Phil /Marcy prefers baking without clamp shell)

...2.75" for the conductance limiting aperture, pack of 10) - Copy from Matt/Marcy's req queue.(Completed)

...2.75" for the conductance limiting aperture, pack of 10) - Copy from Matt/Marcy's req queue.(Completed)

;Marcy/Phil, can you make a tally/description of all the viewers we have at the in

1 Viewer assembly fixture => Marcy has one, would like if a lighter color 2 Will NEG fit 25 l/sec IP on Y => Marcy will check, ask for ENG help if needed

::a. Hose clamps for v-blocks – DONE – Marcy ::b. Angles cut for Y-girder – DONE –Marcy

...leiman, Phil Adderley, Max Bruker, Gabriel Palacios-Serrano, Steve Covert, Marcy Stutzman, Andriy Ushakov, Md. Al Mamun, Shukui Zhang. Not pictured Carlos

# Marcy, Riad, Joe, complete adding material to the "Mott Construction" TN on today

::a. Hose clamps for v-blocks – DONE – Marcy ::b. Angles cut for Y-girder – DONE –Marcy

** Carlos coordinates with Marcy availability of one mirror puck, and one puck with GaAs wafer

3. Marcy - Plan A for vacuum can/diagnostics at gun3 valve, what is useful and makes

* Marcy - 40% RSR, 20% R&D, 20% EIC

# (Daniel, Riad, Tim, Marcy) Corroborate the Lebow and FESEM measurements with foil rate measurements t

# (Marcy) Check Mott vacuum, configuration (hipot 3D01 again?)

#*Marcy and Carlos looked at the screen sections fit inside the HV chamber, Carlos

* Marcy - test YAG resistance

: Once Marcy/Phil give OK on 3I vacuum => John, you can remove VBV3I02 from special inte

...took additional measurements; discussed preliminary action plan with Joe.G/Marcy and Phil. :Was put on hold yesterday ( Phil /Marcy prefers baking without clamp shell)

* Ben Belfore from ODU arrives soon for photocathodes, Marcy? or Matt? will supervise

::a. Hose clamps for v-blocks – DONE – Marcy ::b. Angles cut for Y-girder – DONE –Marcy

* Phil/Marcy starting to NEG coat vacuum chambers; need a 1kW sputtering PS that works (

#) Next meeting: invite Joe, Marcy, Phil, Reza, Alicia and Yan

* Photocathode Physics for Photoinjectors, SLAC, November 10-12, 2021 (Marcy, Carlos, ...)

** Marcy to calculate how many UHV 1400 NEG wafer modules are needed, based on this,

* Marcy checking on top hat configuration for Y-chamber [[media:200326_viewer shiel * Marcy get quotes on A1/A2 cubes and 6-way cross w/ R-R

: Oct ?-?, (Carlos/Marcy program committee), Photocathode Physics for Photoinjectors Workshop, Brook

*** Final thickness measurments from Marcy.

# Finish the straight ahead waist height MeV beamline: Phil/Marcy bake the short section near QCM and remove the clean hood. Start building

...took additional measurements; discussed preliminary action plan with Joe.G/Marcy and Phil. :Was put on hold yesterday ( Phil /Marcy prefers baking without clamp shell)

* Marcy write ATLIS: https://opsweb.acc.jlab.org/CSUEApps/atlis/task/23934

* Marcy checking on top hat configuration for Y-chamber [[media:200326_viewer shiel * Marcy get quotes on A1/A2 cubes and 6-way cross w/ R-R

Danny, Shaun, Gary, Grames, Marcy, Poelker, Reza, Alicia

* Marcy checking on top hat configuration for Y-chamber [[media:200326_viewer shiel * Marcy get quotes on A1/A2 cubes and 6-way cross w/ R-R

*Phil/Marcy have ceramics/NEG wire Plan for the upcoming SAD and injector rebuild (Grames, Adderley, Marcy, Carlos, , Bubba, Windham)

** Marcy's final list [[media:210209_ion pump names.xlsx]]

...f companion foils, our x-axis error bar (Mamun finished with measurements, Marcy completing analysis)

*Phil/Marcy have ceramics/NEG wire Plan for the upcoming SAD and injector rebuild (Grames, Adderley, Marcy, Carlos, , Bubba, Windham)

..., Phil Adderley, John Hansknecht, Reza Kazimi, Matt Poelker, Daniel Moser, Marcy Stutzman, R. Suleiman Shukui Zhang "Milliampere beam studies using high pol

* Marcy Stutzman "Ultra and Extreme High Vacuum" [[media:UHV_XHV_LBL.pdf]] ; JLAAC talks from Matt, Joe, Marcy and Carlos, October 21-23, 2020

...t's populate the new Zimbra calendar resource. Email Carlos, Matt, Joe or Marcy you planned activity, they will put it on the calendar. Do we want represe

* Marcy checking on top hat configuration for Y-chamber [[media:200326_viewer shiel * Marcy get quotes on A1/A2 cubes and 6-way cross w/ R-R

...reens at TBD locations, metal markings on rear, metalized face for charge, Marcy getting bids from Radiabeam * Phil/Marcy starting to NEG coat vacuum chambers; need a 1kW sputtering PS that works (

...reens at TBD locations, metal markings on rear, metalized face for charge, Marcy getting bids from Radiabeam * Phil/Marcy starting to NEG coat vacuum chambers; need a 1kW sputtering PS that works (

* Re-arrange the components near HDIce (Phil, Marcy, Shaun, matt)

*(Marcy, find or buy the pump) Replace the ion pump at the chopper chamber

* Marcy and Carlos are updating the schedule for removing the solenoid NEG tube, ad

:* Jun'23 - CBE (Marcy)

: Align floppy mask to puck on heater, fix mask (comments: Marcy and Mamun looked at the mask assembly, the two screws that hold the mask on

*Phil/Marcy have ceramics/NEG wire Plan for the upcoming SAD and injector rebuild (Grames, Adderley, Marcy, Carlos, , Bubba, Windham)

;Marcy - list any UITF gun and beam line jobs or repairs to make photocathodes rel

1 Viewer assembly fixture => Marcy has one, would like if a lighter color 2 Will NEG fit 25 l/sec IP on Y => Marcy will check, ask for ENG help if needed

Plan for the upcoming SAD and injector rebuild (Grames, Adderley, Marcy, Carlos, , Bubba, Windham)

'''3. Marcy - Plan A for vacuum can/diagnostics at gun3 valve, what is useful and makes

1 Viewer assembly fixture => Marcy has one, would like if a lighter color 2 Will NEG fit 25 l/sec IP on Y => Marcy will check, ask for ENG help if needed

Plan for the upcoming SAD and injector rebuild (Grames, Adderley, Marcy, Carlos, , Bubba, Windham)

:-IPs, Marcy has as-is tally, should be OK, may need to order couple small pumps

...reens at TBD locations, metal markings on rear, metalized face for charge, Marcy getting bids from Radiabeam * Phil/Marcy starting to NEG coat vacuum chambers; need a 1kW sputtering PS that works (

b) Marcy submitted [http://opsweb.acc.jlab.org/CSUEApps/atlis/task/17278 ATLIS task]

*Phil/Marcy have ceramics/NEG wire Plan for the upcoming SAD and injector rebuild (Grames, Adderley, Marcy, Carlos, , Bubba, Windham)

..., Deewakar Poudel, Greg Blume, Stephen Polly, Erdong Wang, Seth M Hubbard, Marcy Stutzman, Joseph Michael Grames, Matt Poelker, Matt Grau, Sylvain Marsillac * Xincun Peng, Matt Poelker, Marcy Stutzman, Bin Tang, Shukui Zhang, and Jijun Zou, "''Mie-type GaAs nanopilla

* Order collars, Marcy on short bolts * sorted through all my deliveries, gave some stuff to phil and marcy.

* Order collars, Marcy on short bolts * sorted through all my deliveries, gave some stuff to phil and marcy.

* Order collars, Marcy on short bolts * sorted through all my deliveries, gave some stuff to phil and marcy.

Plan for the upcoming SAD and injector rebuild (Grames, Adderley, Marcy, Carlos, , Bubba, Windham)

1 Viewer assembly fixture => Marcy has one, would like if a lighter color 2 Will NEG fit 25 l/sec IP on Y => Marcy will check, ask for ENG help if needed

Plan for the upcoming SAD and injector rebuild (Grames, Adderley, Marcy, Carlos, , Bubba, Windham)

* Order collars, Marcy on short bolts * sorted through all my deliveries, gave some stuff to phil and marcy.

* Marcy checking on top hat configuration for Y-chamber [[media:200326_viewer shiel * Marcy get quotes on A1/A2 cubes and 6-way cross w/ R-R

* Marcy vacuum bake 400 C gun/y-chamber *Phil/Marcy have ceramics/NEG wire

* Marcy vacuum bake 400 C gun/y-chamber *Phil/Marcy have ceramics/NEG wire

*Phil/Marcy have ceramics/NEG wire Plan for the upcoming SAD and injector rebuild (Grames, Adderley, Marcy, Carlos, , Bubba, Windham)

* Order collars, Marcy on short bolts * sorted through all my deliveries, gave some stuff to phil and marcy.

1 Viewer assembly fixture => Marcy has one, would like if a lighter color 2 Will NEG fit 25 l/sec IP on Y => Marcy will check, ask for ENG help if needed

:[[media: Marcy's molflo simulations imagining a beamline accident at HDIce.pptx]]

*Phil/Marcy have ceramics/NEG wire Plan for the upcoming SAD and injector rebuild (Grames, Adderley, Marcy, Carlos, , Bubba, Windham)

* Marcy Stutzman, Charles Hetzel, "Pressure Simulations for the EIC Interaction Reg * Wei Lui, Matt Poelker, Shukui Zhang, Marcy Stutzman, "Spin Polarization Sensitivity of Electrons Emitted from Bulk GaA

1 Viewer assembly fixture => Marcy has one, would like if a lighter color 2 Will NEG fit 25 l/sec IP on Y => Marcy will check, ask for ENG help if needed

* Return gun valve config to "normal" (Marcy) * Laser/Y-Chamber viewer for Y-chamber girder (Marcy)