Search found 147 matches

by Michael Bretti
Thu Oct 18, 2018 12:51 pm
Forum: Vacuum Technology (& FAQs)
Topic: Updated Diffusion Pump Assembly and Thermal Modeling
Replies: 3
Views: 189

Re: Updated Diffusion Pump Assembly and Thermal Modeling

Jerry Biehler, Thanks for the link, I will definitely keep it in mind for future aluminum tooling plate. I will certainly need more for other designs and projects. I purchase my aluminum plates from https://www.midweststeelsupply.com/store/, and have already acquired the adapter plates for this desi...
by Michael Bretti
Tue Oct 16, 2018 2:56 am
Forum: Vacuum Technology (& FAQs)
Topic: Updated Diffusion Pump Assembly and Thermal Modeling
Replies: 3
Views: 189

Re: Updated Diffusion Pump Assembly and Thermal Modeling

As mentioned in my above post, I have updated the thermal modeling of the new assembly to better understand how the system will behave thermally, and what to expect during operation for my closed-loop cooling system. A link to the project page is included below: http://appliedionsystems.com/portfoli...
by Michael Bretti
Tue Oct 16, 2018 2:40 am
Forum: Vacuum Technology (& FAQs)
Topic: Updated Diffusion Pump Assembly and Thermal Modeling
Replies: 3
Views: 189

Updated Diffusion Pump Assembly and Thermal Modeling

I have been recently working on the new designs for my vacuum system to incorporate the large 8" baffle to the EO4 diffusion pump, as well as allowing for rapid chamber changes between my three experimental setups. Below is a CAD render of the diffusion pump and baffle assembly with the adapter plat...
by Michael Bretti
Tue Oct 16, 2018 2:21 am
Forum: Vacuum Technology (& FAQs)
Topic: High Vacuum Engineering Design, Analysis, and Build of a Small-Scale Multipurpose System
Replies: 58
Views: 15416

Re: High Vacuum Engineering Design, Analysis, and Build of a Small-Scale Multipurpose System

As of today, the Small Scale Multipurpose V4 system design is obsolete, and I have moved to the newest V5 version update. This update is to adapt the system to the newly designed high vacuum pumping assembly and utilize the highly modular design of my pumping station to its fullest. This update allo...
by Michael Bretti
Thu Sep 20, 2018 7:21 pm
Forum: Vacuum Technology (& FAQs)
Topic: High Vacuum Engineering Design, Analysis, and Build of a Small-Scale Multipurpose System
Replies: 58
Views: 15416

Re: High Vacuum Engineering Design, Analysis, and Build of a Small-Scale Multipurpose System

Another quick update on the project progress so far, and the scope going forward. The cooling system is about complete and almost ready for final testing, and is currently being integrated with the new control system I am working on. The control system hardware is being assembled, and is in the proc...
by Michael Bretti
Sun Sep 09, 2018 12:03 am
Forum: The Trading Post
Topic: Michael Bretti - High Vacuum Surplus FOR SALE - September 2018
Replies: 1
Views: 498

Re: Michael Bretti - High Vacuum Surplus FOR SALE - September 2018

New pricing update for the above parts. Everything is still available, and see the description above for details: 1.) 2.75" Conflat Inline Pneumatic Valve - $80.00 2.) Nor-Cal 61-344778-00 90 Degree KF25 to Conflat 2.75" Pneumatic Valve - $45.00 3.) MDC 2.75" Conflat Manual Butterfly Isolation Valve...
by Michael Bretti
Wed Sep 05, 2018 9:09 pm
Forum: The Trading Post
Topic: OFHC copper tube 1/2"
Replies: 2
Views: 305

Re: OFHC copper tube 1/2"

Roberto, For OFC tubes, bars, and stock, I would suggest looking at Online Metals - https://www.onlinemetals.com/. They have C101 OFC for quite reasonably low costs, and I often order metals from them since they have such a large range of stock. For 1/2"OD tubing, they have several sizes with varyin...
by Michael Bretti
Sun Sep 02, 2018 7:25 pm
Forum: The Trading Post
Topic: Michael Bretti - High Vacuum Surplus FOR SALE - September 2018
Replies: 1
Views: 498

Michael Bretti - High Vacuum Surplus FOR SALE - September 2018

I have a new load of great high vacuum parts for sale. Some of these pains me to sell, but at the moment I will not be using them myself for the foreseeable future, and need to raise additional funds for my high priority high vacuum projects. Sales are first come, first serve. Prices are negotiable ...
by Michael Bretti
Mon Aug 27, 2018 12:50 am
Forum: Vacuum Technology (& FAQs)
Topic: High Vacuum Engineering Design, Analysis, and Build of a Small-Scale Multipurpose System
Replies: 58
Views: 15416

Re: High Vacuum Engineering Design, Analysis, and Build of a Small-Scale Multipurpose System

New update on the cooling system build. I finally completed the first round of preliminary testing this week, and have analyzed the data and calculated all the major thermal parameters of the system. So far, it appears that it is performing grossly under spec - however, I have traced the problem bac...
by Michael Bretti
Tue Aug 14, 2018 2:52 am
Forum: Vacuum Technology (& FAQs)
Topic: High Vacuum Engineering Design, Analysis, and Build of a Small-Scale Multipurpose System
Replies: 58
Views: 15416

Re: High Vacuum Engineering Design, Analysis, and Build of a Small-Scale Multipurpose System

Full technical specifications, CAD files, cost analysis, build pictures, and a detailed overview comparison article between the iterations of the cooling systems are now available for the peltier-based chiller for diffusion pump cooling system: http://appliedionsystems.com/portfolio/closed-loop-pelt...