--- title: "Tools: Calculators, the Virtual Laboratory and the Cyclotron Builder · Cyclotron Info" canonical: https://cyclotroninfo.com/tools/ description: "Every interactive tool on the site in one place: seven design calculators that run in your browser, the hosted Virtual Cyclotron Laboratory with six guided exercises, the planning-grade Cyclotron Builder, and the live maps, filters and models inside the reference pages." generated: 2026-11-09 note: "Markdown rendering of the canonical HTML page, generated at build for AI assistants and text tools. Figures and interactive elements are described, not reproduced. On Design Guide rules the source quote, this site's paraphrase and this site's editorial note are labelled separately and must not be conflated." licence: "Datasets CC BY 4.0, census snapshot CC BY-NC 4.0 (https://cyclotroninfo.com/data/); cite as Cyclotron Info, cyclotroninfo.com" --- # Tools Everything on this site that you operate rather than read, in one list. Each entry says what the tool answers, what grade its answer is, and where the computation happens. Two tools run on a backend of their own, on separate subdomains; everything else runs in the page, and nothing here sets a cookie, needs an account or stores what you enter. ## Hosted tools Both compute each request on a backend from the settings in the request and nothing else, and keep no state between visits ([About, Privacy](https://cyclotroninfo.com/about/#privacy)). ### [Virtual Cyclotron Laboratory](https://lab.cyclotroninfo.com/) An interactive simulator of an illustrative ~150 keV classical proton cyclotron. Set the field, RF frequency, dee voltage and source; watch a weighted ensemble of ions accelerate; inspect a single path crossing the gap; sweep one control and export the curve. Illustrative, not a calibrated replica of any real machine; every reading comes from one evaluated ensemble named by its revision. A [full workspace](https://lab.cyclotroninfo.com/full) adds the field atlas and acceptance views, and [six guided exercises](https://cyclotroninfo.com/learn/exercises/) turn it into a short course. ### [Cyclotron Builder](https://build.cyclotroninfo.com/) Planning grade; hosted. Simple mode asks six questions about purpose, budget, space, power, skills and parts already owned, searches its catalogs of magnets, coils, chambers, pumps and RF systems, keeps the designs that fit, and shows the one with the most energy, with a costed bill of materials, a build-time estimate and a report whose safety section comes first. [Full mode](https://build.cyclotroninfo.com/full) adds experiments the machine must support, energy floors, a pin on every subsystem, a compare screen and orbit verification. Costs are estimates with a range; energies are computed from the field at the usable radius; nothing past 1 MeV is detailed; it produces no drawings. ## Calculators Seven design calculators, each running entirely in the browser. Every page derives the formulas it uses, states its assumptions and limits of validity, cites the references the formulas come from, loads with a worked example, and keeps your inputs in the address bar so a calculation can be shared as a link. The [calculators page](https://cyclotroninfo.com/calculators/) introduces them together. ### [Cyclotron Energy](https://cyclotroninfo.com/calculators/cyclotron-energy/) Beam energy, resonance frequency, magnetic rigidity, and particle speed from field, radius, and particle — with a check on when relativity starts to matter. ### [Path Length & Turns](https://cyclotroninfo.com/calculators/path-length/) Energy gain per turn, turn count, total spiral path length, and orbit separation from the dee voltage — the numbers behind vacuum and extraction requirements. ### [Vacuum & Beam Survival](https://cyclotroninfo.com/calculators/vacuum/) Mean free path and estimated surviving beam fraction versus pressure, residual gas, and path length; what pressure keeps losses under 10%. ### [Magnet Power](https://cyclotroninfo.com/calculators/magnet-power/) Amp-turns required for a gap field, and coil dissipation from either a known winding or a copper mass budget — with honest saturation limits. ### [Coil Geometry](https://cyclotroninfo.com/calculators/coil-geometry/) Outer diameter, conductor length, hot and cold resistance, and copper mass of a layer-wound magnet coil. ### [Lid Deflection](https://cyclotroninfo.com/calculators/lid-deflection/) Center deflection, peak stress, and safety factor of a circular vacuum chamber lid under atmosphere, for O-ring and bolted edges. ### [Dee Capacitance & RF Matching](https://cyclotroninfo.com/calculators/dee-capacitance-matching/) Estimated dee-to-liner capacitance, the inductance to resonate it, and an L-network to match the tank to a 50 Ω source. ## Live models, maps and filters inside the reference pages These are part of a page rather than tools of their own, but each one is something you operate. - [How a Cyclotron Works](https://cyclotroninfo.com/learn/how-a-cyclotron-works/) carries an animated model: move the field and dee-voltage sliders and every quantity in the text recomputes from the same physics. The [beam dynamics](https://cyclotroninfo.com/learn/beam-dynamics/) page is a deep dive with figures, not a simulator; the dynamics themselves are in the laboratory. - The [worldwide directory](https://cyclotroninfo.com/locations/) is a map and list of the census, filterable by machine category, status and country, with a section on the [cyclotrons you can visit](https://cyclotroninfo.com/locations/#visiting). - The [legal survey](https://cyclotroninfo.com/legal/) has an interactive map of the fifty US states and a page for each jurisdiction. Descriptive, not legal advice. - The [Design Guide filter view](https://cyclotroninfo.com/design-guide/) combines subsystem and level filters with a text search over every sourced rule, and its address tracks the filters so a selection can be shared; the [level pages](https://cyclotroninfo.com/design-guide/level/1/) and the per-subsystem pages are the places to read from. - The [library](https://cyclotroninfo.com/library/) filters its documents by topic and era and exports any selection as BibTeX; the [amateur builds census](https://cyclotroninfo.com/builds/#compare) ends in one comparison table. - [Site search](https://cyclotroninfo.com/search/) runs in the browser over an index built with the site; nothing you type leaves the page. ## Beyond the browser When a calculator is not enough, the [modeling tools guide](https://cyclotroninfo.com/learn/modeling-tools/) surveys the free simulation software (FEMM, Elmer, OPAL, Molflow+ and others) that answers the harder questions, with what each is for and how to start. The site's datasets, for your own analysis, are on the [data and downloads](https://cyclotroninfo.com/data/) page.