Difference between revisions of "Gabriel Palacios-Serrano"

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*[https://drive.google.com/file/d/1FpWgPuf9JgBxLSfFNQE8-ZHq7Sncs88N/view PhD Dissertation defense March 23 2021]
 
*[[Media:Gabriel's thesis outline draft Feb 2019 Rev00.docx]]  
 
*[[Media:Gabriel's thesis outline draft Feb 2019 Rev00.docx]]  
  
 
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== HV insulator for 500 kV: ==
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** Feb 2023 project update [[Media: 500_kV_project_update_Feb_2023.pptx]]
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** Exploring the use of the receptacle and the sizes of the SF6 spool [[Media:HV_insulator-1st_month.pptx]]
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** Jan 2023 summary [[Media:500kV Summary Jan 2023.png]]
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** Reached 315 kV [[Media:221220253.5.png]]
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==Snapshots of tracking at -200 kV, E_0 = 0.025 eV , r = 2 mm.==
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[[Image:200 kV white tracking.png|500px|thumb|left|T-cathode]] [[Image:Shield 8 tracking.png|500px|thumb|right|R28-2]] [[Image:R30-3 tracking.png|500px|thumb|left|R30-3]] [[Image:R30-4 tracking.png|500px|thumb|right|R30-4]]
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==18 in gun:==
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** Kick and angle after S&A found a 0.5 mm anode deviation [[Media: CIS-R30-3_slots_SURVEYED_CHECK_crashed.pptx]]
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** Hinged anode simulations<span class="dangerousLink">[https://wiki.jlab.org/ciswiki/images/f/fa/18_in_CEBAF_gun_Hinged_anode.pptx 18_in_CEBAF_gun_Hinged_anode.pptx][https://wiki.jlab.org/ciswiki/images/b/bf/18_in_CEBAF_gun_Hinged_anode_V2_with_shift_comparison.pptx 18_in_CEBAF_gun_Hinged_anode_V2_with_shift_comparison.pptx] [https://wiki.jlab.org/ciswiki/images/b/b4/R30-3_Shauns_hinged_anode.pptx R30-3_Shauns_hinged_anode.pptx][https://wiki.jlab.org/ciswiki/images/c/ce/R30-3_Shauns_hinged_anode_FINER_MESH.pptx R30-3_Shauns_hinged_anode_FINER_MESH.pptx][https://wiki.jlab.org/ciswiki/images/8/8f/R30-3_Shauns_hinged_anode_Found_X_ASYM_culprit.pptx R30-3_Shauns_hinged_anode_Found_X_ASYM_culprit.pptx]  ''' ''' </span>
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** Comparing Shields to answer the question: Can we use a smaller shield for op at -200 kV? [[Media: GTS_gun_with_CEBAF_anode_Shields.pptx]]
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** Exploring the anode location to cancel vertical kick [[Media:18in_gun_anode_studies.pptx]]
  
 
== Wien filter stuff: ==
 
== Wien filter stuff: ==
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'''12th International Particle Accelerator Conference - IPAC’21, May 24-28, 2021''' https://www.ipac21.org/#
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** Wien filter submitted after JLab internal review approval [[Media:Gabriel Palacios Wien filter Abstract IPAC21 FINAL.docx]]
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** Poster slides [[Media:IPAC_2021_poster_slides_final_Gabriel_Palacios.pptx]]
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Summary comparing GPT results with ideal E-field CST model compared to actual surveyed Vertical Wien assembly.
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The presentation also indicates the location in the O group drive of the various CST-generated E-field maps and GPT beam dynamics simulations.
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The Horizontal beam assembly electrode assembly is < 100 micron difference in pitch along the beam path. There was no need to generate a new field map.
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*[[Media:Vertical Wien GPT sims with spline electrodes Surveyed.pptx]]
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Spline electrode GPT simulations
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* [[Media:Wien_filter_GPT_7_Spline_electrode.pptx ]]
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Asymmetric bias GPT simulations
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* [[Media:Wien_filter_GPT_6.pptx ]]
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Inter-plate gap GPT simulations
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* [[Media:Wien_filter_GPT_5.pptx ]]
  
 
Optics of the Wien filter, final
 
Optics of the Wien filter, final
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== Gun related ==
 
== Gun related ==
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'''R30-4'''
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* [[Media:R30-4_Puck_and_Pierce.pptx]]
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* [[Media:R30-4_Puck_and_Pierce_2.pptx]]
  
 
'''Solidworks sumary'''
 
'''Solidworks sumary'''
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(Both guns biased at -200kV)
 
(Both guns biased at -200kV)
 
* [[Media:COMSOL comparison CEBAF 130kV to 200kV upgrade.pdf]]
 
* [[Media:COMSOL comparison CEBAF 130kV to 200kV upgrade.pdf]]
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* [[Media:COMSOL ceramic conductivity.pdf]]
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* [[Media:COMSOL ceramic conductivity.pdf]]-

Latest revision as of 09:56, 17 January 2024

HV insulator for 500 kV:


Snapshots of tracking at -200 kV, E_0 = 0.025 eV , r = 2 mm.

T-cathode
R28-2
R30-3
R30-4

18 in gun:

Wien filter stuff:

12th International Particle Accelerator Conference - IPAC’21, May 24-28, 2021 https://www.ipac21.org/#

Summary comparing GPT results with ideal E-field CST model compared to actual surveyed Vertical Wien assembly. The presentation also indicates the location in the O group drive of the various CST-generated E-field maps and GPT beam dynamics simulations. The Horizontal beam assembly electrode assembly is < 100 micron difference in pitch along the beam path. There was no need to generate a new field map.

Spline electrode GPT simulations

Asymmetric bias GPT simulations

Inter-plate gap GPT simulations

Optics of the Wien filter, final

Optics of the Wien filter, first try

Bolts and washers (metal and alumina sims).

Exploring the reduction on the inter-plate gap.

Double thickness mounting tab sims.

Wien filter 6: What do we need for the 200 kV Wien filter using the UITF one as a base?

Wien filter 4: What do we need for the 200 kV Wien filter using the UITF one as a base?

Wien filter 3: I measured the vacuum lab's Wien filter and checked what we can scavenge for the 40 kV feedthrough version.

Wien filter 2: Simulation results for the 40 kV feedthrough for Wien filter at UITF.

Wien filter 1: Simulation results for the existing (05/22/2019) Wien filter at UITF.

Gun related

R30-4

Solidworks sumary


Data taking runs

UITF T-cathode electrode vs Small Shield: BPM data and centering in first lens at 200 [kV]

Log entry related to how the Laser XY stage moves along the X-axis

Images of on axis QE run p2_2019-06-04_15_39 to calculate STEP-mm conversion factor

Ey difference for T-cathode and Small shield (From CST field maps)


GPT, CST, COMSOL

CST particle tracking of T-cathode, Small Shield and Big Shield @-200 kV

CORRECTION: CST and GPT info for the T-shape, mushroom, small mushroom, sphere small anode 6cm gap, sphere long anode 6cm gap, sphere long anode 9cm gap at -200 kV. This file has the CEBAF parameters.

GPT results for the sphere long anode 9cm gap at -300 kV. This was produced using Yan's GTS parameters. Impact of GBacc on emittance.

GPT results for the sphere long anode 9cm gap at -300 kV. This was produced using Yan's GTS parameters. Impact of field map interpolation step-size on emittance.

GPT results for the sphere long anode 9cm gap at -200 kV. This was produced using Yan's GTS parameters. We are trying to find out why is the measurements and simulated emittance so different.

THIS FILE HAS BEEN CORRECTED: CST and GPT info for the T-shape, mushroom, small mushroom, sphere small anode 6cm gap, sphere long anode 6cm gap, sphere long anode 9cm gap at -200 kV. This file has the CEBAF parameters.

Preliminary GPT results for the T-cathode vs Mushroom vs Sphere at -200 kV. This file has the CEBAF parameters. This is the same as the previous entry but shows extra slides with comparisons of the three cathodes wth one metric as requested by Matt.

Preliminary GPT results for the T-cathode vs Mushroom vs Sphere at -200 kV. This file has the CEBAF parameters.

Preliminary GPT results for the T-cathode vs Mushroom vs Sphere at -200 kV.

Test shields 1 to 7 simulations on CST for the -200 kV new CEBAF gun (and includes a bit of the GTS gun field maps at 200 kV w/small anode).

Test shields 1,2,3 & 4 simulations on CST for the -200 kV new CEBAF gun.

Field maps for the -200 kV new CEBAF gun @-130 kV and -180 kV.

Results for CST microwave studio simulations of the -300 kV GTS gun.

Corrections on the simulation results for the -200 kV CEBAF gun paper.

Document with details on the Pierce geometry angle variations for the -300 kV GTS gun.

COMSOL simulations for 300kV and 200kV guns upper shields

COMSOL modeling comparing CEBAF 130kV white insulator no shed versus Upgrade 200kV black insulator with shed. (Both guns biased at -200kV)

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