Capabilities

Machining, vacuum sealing surfaces, inspection, and the outside processes Devlen coordinates.

Machining

5-axis CNC milling with integrated C-axis turning (mill-turn) on a single machine. There is no separate dedicated lathe — turning is done on the same machine through its C-axis, which means a part needing both milled and turned features can often be finished in one setup rather than being re-fixtured between machines.

Equipment

Brother Speedio M200XD1-5AX with the 16,000 min⁻¹ spindle. Specifications below are from Brother's published data for the model.

Materials

Most metals and engineering plastics, including the copper and stainless alloys ordinary in accelerator and vacuum work.

Not machined: graphite, G10, or phenolics — keeping dust- and contamination-generating materials out of the shop is part of what protects the UHV work done in it.

Vacuum and cleanliness

Written procedures, not ad-hoc practice — adapted from published national-laboratory procedures and scaled to a shop this size:

• Vacuum / UHV cleaning — degrease, clean, rinse and dry to a defined sequence, with the process recorded against the job.
• Clean handling and assembly — glove and tooling discipline, packaging, and what a part may and may not touch after cleaning.

Each procedure carries its own scope notes; whether it applies as written to a given program is confirmed at contract review rather than assumed.

Beam diagnostics and instrumentation

Diagnostics is where a mechanical tolerance becomes a measurement error. A button pickup that is a few tens of microns out of symmetry with its neighbours is a position offset the electronics cannot calibrate away; a screen that sits a fraction of a degree off its intended angle moves the image plane. The mechanical work and the instrument's accuracy are the same problem.

Hardware Devlen is set up to make:

• Beam position monitors — button and stripline pickup bodies, electrode geometry, and the machining around commercial feedthroughs
• Viewscreen and flag assemblies — screen holders, target ladders, mirror mounts and the actuator hardware they ride on
• Wire scanners and profile monitors — forks and frames where the fixturing problem is holding something thin and fragile without marking or stressing it
• Slits, scrapers, collimators and Faraday cups
• Masks and grids for emittance measurement
• In-vacuum optical hardware — extraction mirror mounts and adjustment mechanisms that have to hold alignment through bake-out

What tends to matter on these parts, beyond the dimensions:

• Symmetry between features, not just tolerance on each one — pickups are only as good as how well they match each other
• Alignment references that survive installation, so the datum a part was inspected to is the one it can be fiducialised and surveyed against in the tunnel
• Impedance continuity — steps, gaps and trapped geometry the beam will notice
• UHV-compatible and bakeable throughout, with the cleaning and handling that implies
• Quantities of one to a few, on a schedule set by a shutdown window rather than by a production plan

Vacuum sealing surfaces

Standard and custom knife edges. CF/ConFlat sealing geometry to the standard flange sizes, and custom knife edges where a chamber, feedthrough or one-off assembly needs a sealing surface that no catalogue flange provides.

Knife edges are a good example of why this work sits apart from general machining: the seal is made by a single sharp circular edge biting into a soft gasket, so the finish, the edge condition and the freedom from any nick or handling mark are the part. They are cut, protected through the remaining operations, and handled to SOP-003 and SOP-004 so the sealing surface that leaves the shop is the one that was inspected.

Design

Machining to a customer-supplied print is the default. Devlen also takes on mechanical design work and can originate the drawing package — in which case design authority, revision control, and ownership of the resulting data are settled in writing before the work starts.

Not offered: structural, electromagnetic, or vacuum simulation. Where a design needs analysis signed off, that comes from your side or a third party and Devlen machines to the result.

Engineering consulting

Design review, DFM, fixture and process development, billed by the day or half day. Useful before a print is finished, when the question is whether a geometry can be made at all and what it will cost to hold.

Inspection

First article, in-process and final inspection are performed to the customer's requirements and recorded against the job, with the evidence filed alongside it.

A Zeiss DuraMax CMM is the next planned capital purchase after the machining centre — dimensional verification on this kind of hardware is worth owning rather than renting. Until it is installed, measurement beyond current in-house capability is arranged with an outside inspection source.

Processes we coordinate

Most accelerator hardware needs more than machining before it is finished. Devlen coordinates those operations rather than handing back a raw part and leaving you to route it: the part goes out, comes back, and the supplier's certificate is filed against the job so the finished article has one complete record.

• Electropolishing and chemical cleaning
• Vacuum brazing, e-beam and TIG welding
• Heat treatment and vacuum bake-out
• Plating and surface treatment — copper, nickel, gold, passivation
• Polishing and specialised surface finishing
• Wire EDM

Outsourced work is placed with approved suppliers under the purchasing and supplier-approval procedure, and the certificates come back into the job file.

Traceability

Every part carries a permanent part number, and every lot is run under its own job number with its own traveler, material certifications and inspection records. A Certificate of Conformance is issued against that job, so the documentation that ships with a part refers to the specific lot it came from.