Learn about Mu2e-II: Difference between revisions
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| Peak bunch size || 2<math>\small{\times 10^8}</math> || (5 mA, can't be changed quickly) | | Peak bunch size || 2<math>\small{\times 10^8}</math> || (5 mA, can't be changed quickly) | ||
| | |||
| Bunch size to Mu2e-II || 1.4<math>\small{\times 10^8}</math> || (for 2 mA average current) | |||
|- | |- | ||
| RF frequency || 162.5 || MHz, full bunch rate from PIP-II | | RF frequency || 162.5 || MHz, full bunch rate from PIP-II | ||
Revision as of 22:03, 29 September 2021
| Parameter | Nominal value | Units, Comments | ||||
|---|---|---|---|---|---|---|
| PIP-II parameters | ||||||
| Beam energy (kinetic) | 800 | MeV | ||||
| 1.28[math]\displaystyle{ \small{\times 10^{-10}} }[/math] | J | |||||
| I_average | 2 | mA (5 mA peak) | ||||
| Bunch length | 4 | ps ([math]\displaystyle{ \sigma_t }[/math]) | ||||
| [math]\displaystyle{ \epsilon_L }[/math] | 1.1 | ns-keV (rms) | ||||
| [math]\displaystyle{ \sigma_E }[/math] | 275 | keV ([math]\displaystyle{ \epsilon_L/\sigma_t }[/math]) | ||||
| PIP-II booster pulse | ||||||
| Particles/pulse | 6.7[math]\displaystyle{ \small{\times 10^{12}} }[/math] | |||||
| Pulse length | 550 | [math]\displaystyle{ \small\mu }[/math]s | ||||
| Pulse rep rate | 20 | Hz | ||||
| Bunch pattern | programmable | |||||
| Bunch size | 0.8[math]\displaystyle{ \small{\times 10^8} }[/math] | (2 mA, CW) | ||||
| Peak bunch size | 2[math]\displaystyle{ \small{\times 10^8} }[/math] | (5 mA, can't be changed quickly) | Bunch size to Mu2e-II | 1.4[math]\displaystyle{ \small{\times 10^8} }[/math] | (for 2 mA average current) | |
| RF frequency | 162.5 | MHz, full bunch rate from PIP-II | ||||
| 325 | MHz | |||||
| 650 | MHz | |||||
| Operation | 40 | wk/yr | ||||
| Up time in operation | 90 | % | ||||
| Mu2e-II parameters | ||||||
| Bunch frequency | 81.25 | MHz (assumes 1/2 of 162.5 available) | ||||
| Calibration, background, special runs | 30 | % | ||||
| CE data | 70 | % | ||||
| Mu2e-II efficiency | 100 | % | ||||
| CE run time/yr | 1.5[math]\displaystyle{ \small{\times 10^{7}} }[/math] | s | ||||
| Duration of run | 4 | yr | ||||
| Total run time | 6[math]\displaystyle{ \small{\times 10^7} }[/math] | s | ||||
| Total linac reps | 1.2[math]\displaystyle{ \small{\times 10^{9}} }[/math] | |||||
| Extinction | 1[math]\displaystyle{ \small{\times 10^{-11}} }[/math] | [1[math]\displaystyle{ \small{\times 10^{-13}} }[/math] for 100x safety margin] | ||||
| Beam power | 120 | kW (100 kW nominal) | ||||
| Number of bunches/spill | 8 | (at 81.25 MHz) | ||||
| Spill width | 100 | ns | ||||
| Production target parameters | ||||||
| Material | ||||||
| Power deposition | kW | |||||
| Optimizable parameters for stopping target material | ||||||
| Aluminum stopping target | ||||||
| Spill period | 1693 | ns | ||||
| Spills/linac rep | 27770 | approximate, at 20 Hz linac repetition rate | ||||
| Protons/spill | 1.6[math]\displaystyle{ \small{\times 10^{9}} }[/math] | (5 mA) | ||||
| POT | 5[math]\displaystyle{ \small{\times 10^{22}} }[/math] | |||||
| Stopped mu/p | 1.9[math]\displaystyle{ \small{\times 10^{-4}} }[/math] | rough estimate, TBC, assumes stopped mu/kW same at 800 and 8000 MeV among possibly other things | ||||
| SES | <3[math]\displaystyle{ \small{\times 10^{-18}} }[/math] | |||||
| E(conversion e-) | 104.97 | MeV | ||||
| tau(muon) | 864 | ns | ||||
| Lead stopping target | ||||||
| E(conversion e-) | 94.9 | MeV | ||||
| Tracker | ||||||
| Resolution at 100 MeV | ||||||
| Calorimeter | ||||||
| Material | ||||||
| Energy resolution | 5% | % (FWHM/2.36) | ||||
| Time resolution | < 500 | ps | ||||
| Position resolution | 10 | mm | ||||
| Radiation dose | 10 | kGy/yr | ||||
| [math]\displaystyle{ \small 1\times 10^{13} }[/math] | n/cm[math]\displaystyle{ \small{^2} }[/math] (total 1 MeV equivalent) | |||||
| Cosmic Ray Veto | ||||||
| Trigger/DAQ | ||||||
| Event size | 1 | MB | ||||
| Tape storage | 14 | PB/yr | ||||