colin
99e7306ae9
this achieves a few things: - trivial way to get these shipped as the default nix package - better dependency management - ability to split large applications into multiple files the README probably needs some updating.
172 lines
7.2 KiB
Rust
172 lines
7.2 KiB
Rust
//! this example stacks buffers vertically so that we can couple them with MANY wire loops.
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//! the conclusion is that denser loops gets the coupling closer to 1:1 (counteracts losses),
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//! but it likely won't ever achieve amplification.
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use coremem::{Driver, mat, meas, SpirvDriver};
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use coremem::geom::{Meters, Torus};
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use coremem::sim::units::Seconds;
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use coremem::stim::{CurlStimulus, Sinusoid1, TimeVarying as _};
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fn main() {
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coremem::init_logging();
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let feat_size = 40e-6f32;
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let buffer_xy = 160e-6;
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let buffer_z = 160e-6;
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let boundary_xy = 320e-6;
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let boundary_z = 320e-6;
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let ferro_major = 640e-6;
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let ferro_minor = 60e-6;
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let ferro_buffer = 160e-6; // vertical space between ferros
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let wire_minor = 40e-6;
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let wire_set_major = 140e-6; // this just needs to exceed ferro_minor + wire_minor; less than ferro_buffer - wire_minor
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let wire_coupling_major = 280e-6; // (ferro_minor*4 + ferro_buffer)/2 + wire_minor = 220
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let drive_conductivity = 5e6f32;
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let peak_set_current = 15.0;
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let peak_clock_current = 100.0;
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let set_duration = 10e-9; // half-wavelength of the sine wave
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let steady_time = 500e-9; // how long to wait for sets to stabilize
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let clock_duration = 1e-9;
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let m_to_um = |m: f32| (m * 1e6).round() as u32;
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let feat_vol = feat_size * feat_size * feat_size;
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let base = "buffer3-13";
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let width = 2.0*(ferro_major + wire_coupling_major + wire_minor + buffer_xy + boundary_xy);
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let height = width;
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let depth = 2.0*(wire_coupling_major + wire_minor + buffer_z + boundary_z);
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let ferro1_center = Meters::new(0.5 * width, 0.5 * height, 0.5 * depth - ferro_minor - 0.5 * ferro_buffer);
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let ferro2_center = Meters::new(0.5 * width, 0.5 * height, 0.5 * depth + ferro_minor + 0.5 * ferro_buffer);
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// reserve the left/right locations for the SET wires.
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let set1_center = (ferro1_center + ferro2_center) * 0.5 + Meters::new(-ferro_major, 0.0, -wire_set_major);
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let set2_center = (ferro1_center + ferro2_center) * 0.5 + Meters::new(ferro_major, 0.0, wire_set_major);
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let ferro1_region = Torus::new_xy(ferro1_center, ferro_major, ferro_minor);
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let ferro2_region = Torus::new_xy(ferro2_center, ferro_major, ferro_minor);
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let set1_region = Torus::new_xz(set1_center, wire_set_major, wire_minor);
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let set2_region = Torus::new_xz(set2_center, wire_set_major, wire_minor);
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let rev = 6.283185307179586;
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// let coupling_angles = [0.25*rev, 0.75*rev];
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// let coupling_angles = [0.125*rev, 0.25*rev, 0.375*rev, 0.625*rev, 0.75*rev, 0.875*rev];
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let coupling_angles = [
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0.0625*rev,
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0.1250*rev, 0.1875*rev,
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0.2500*rev, 0.3125*rev,
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0.3750*rev, 0.4375*rev,
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0.5625*rev,
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0.6250*rev, 0.6875*rev,
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0.7500*rev, 0.8125*rev,
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0.8750*rev, 0.9375*rev,
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];
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let define_coupling_region = |angle: f32| -> Torus {
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let ferro_center = (ferro1_center + ferro2_center) * 0.5;
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let tor_center = ferro_center + Meters::new(angle.cos(), angle.sin(), 0.0) * ferro_major;
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let tor_normal = Meters::new(-angle.sin(), angle.cos(), 0.0);
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Torus::new(tor_center, tor_normal, wire_coupling_major, wire_minor)
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};
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let coupling_regions: Vec<_> = coupling_angles.iter().cloned().map(define_coupling_region).collect();
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// mu_r=881.33, starting at H=25 to H=75.
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let ferro_mat = mat::MHPgram::new(25.0, 881.33, 44000.0);
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// let ferro_mat = mat::db::conductor(drive_conductivity);
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let wire_mat = mat::IsomorphicConductor::new(drive_conductivity);
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let mut driver: SpirvDriver = Driver::new_spirv(Meters::new(width, height, depth), feat_size);
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driver.set_steps_per_stim(1000);
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driver.fill_region(&ferro1_region, ferro_mat);
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driver.fill_region(&ferro2_region, ferro_mat);
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driver.fill_region(&set1_region, wire_mat);
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driver.fill_region(&set2_region, wire_mat);
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for r in &coupling_regions {
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driver.fill_region(r, wire_mat);
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}
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println!("boundary: {}um; {}um", m_to_um(boundary_xy), m_to_um(boundary_z));
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println!("size: {}, {}, {}", width, height, depth);
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println!("ferro1: {:?}", ferro1_center);
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println!("ferro2: {:?}", ferro2_center);
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driver.add_classical_boundary(Meters::new(boundary_xy, boundary_xy, boundary_z));
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assert!(driver.test_region_filled(&ferro1_region, ferro_mat));
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assert!(driver.test_region_filled(&ferro2_region, ferro_mat));
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assert!(driver.test_region_filled(&set1_region, wire_mat));
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assert!(driver.test_region_filled(&set2_region, wire_mat));
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for r in &coupling_regions {
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assert!(driver.test_region_filled(r, wire_mat));
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}
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let mut add_drive_pulse = |region: &Torus, start, duration, amp| {
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let wave = Sinusoid1::from_wavelength(amp, duration * 2.0)
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.half_cycle()
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.shifted(start);
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driver.add_stimulus(CurlStimulus::new(
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region.clone(),
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wave.clone(),
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region.center(),
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region.axis()
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));
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};
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// J=\sigma E
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// dJ/dt = \sigma dE/dT
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// dE/dt = dJ/dt / \sigma
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// dE/dt = dI/dt / (A*\sigma)
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// if I = k*sin(w t) then dE/dt = k*w cos(w t) / (A*\sigma)
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// i.e. dE/dt is proportional to I/(A*\sigma), multiplied by w (or, divided by wavelength)
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let peak_set = peak_set_current / feat_vol / (set1_region.cross_section() * drive_conductivity);
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let peak_clock = peak_clock_current / feat_vol / (set1_region.cross_section() * drive_conductivity);
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// SET cores
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add_drive_pulse(&set1_region, 0.01*set_duration, set_duration, -peak_set);
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add_drive_pulse(&set2_region, 0.01*set_duration, set_duration, -peak_set);
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// CLEAR core1
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add_drive_pulse(&set1_region, set_duration + steady_time, clock_duration, peak_clock);
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let duration = 2.5*steady_time;
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for (i, r) in coupling_regions.iter().enumerate() {
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driver.add_measurement(meas::CurrentLoop::new(&*format!("coupling{}", i), r.clone()));
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}
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driver.add_measurement(meas::Volume::new("mem1", ferro1_region.clone()));
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driver.add_measurement(meas::MagneticLoop::new("mem1", ferro1_region.clone()));
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driver.add_measurement(meas::Volume::new("mem2", ferro2_region.clone()));
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driver.add_measurement(meas::MagneticLoop::new("mem2", ferro2_region.clone()));
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driver.add_measurement(meas::CurrentLoop::new("set1", set1_region.clone()));
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driver.add_measurement(meas::Power::new("set1", set1_region.clone()));
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driver.add_measurement(meas::CurrentLoop::new("set2", set2_region.clone()));
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let prefix = format!("out/{}/{}-{}-{}setmA-{}setps-{}clkmA-{}clkps-{}um-{}xcoupling",
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base,
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base,
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*driver.size(),
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(peak_set_current * 1e3).round() as i64,
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(set_duration * 1e12).round() as i64,
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(peak_clock_current * 1e3).round() as i64,
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(clock_duration * 1e12).round() as i64,
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(feat_size * 1e6).round() as i64,
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coupling_regions.len(),
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);
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let _ = std::fs::create_dir_all(&prefix);
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driver.add_state_file(&*format!("{}/state.bc", prefix), 16000);
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// driver.add_serializer_renderer(&*format!("{}/frame-", prefix), 32000, None);
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driver.add_csv_renderer(&*format!("{}/meas.csv", prefix), 200, None);
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driver.add_csv_renderer(&*format!("{}/meas-sparse.csv", prefix), 8000, None);
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driver.step_until(Seconds(duration));
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}
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