| Technische Daten |
Hier für alle Technikfüchse, Profis und sonstige Interessierte eine Liste möglicher technischer Daten der geplanten ESS-Anlage. Zu einigen Teilen gibt es Alternativentwürfe, endgültig wird wohl erst beim Baubeginn entschieden.
MAIN LINAC PARAMETERS
| Linac beam energy | 1.334 GeV (H-) |
| Linac beam power (average) | 5.1 MW |
| Linac average/peak current | 3.83/ 114 mA |
| Linac repetition rate | 50 Hz |
| Linac beam pulse duration | 2 x (0.48 to 0.56) ms |
| Linac overall length | 769 m |
MAIN RING PARAMETERS
| Frequency of parallel operation of 2 rings | 50 Hz |
| Mean radius of accumulator rings | 35.0 m |
| Number of circulating protons per ring | 2.34 x 1014 |
| Beam revolution frequency | 1.2412 MHz |
| Dual harmonic rf-system h=1, h=2 | 1.2412 & 2.4824 MHz |
| Bunch duration per ring at ejection | 0.6 m sec |
GENERAL LINAC PARAMETERS
| Radio frequencies | 280, 560 MHz |
| Total length | 769 m |
| Average beam power | 5.1 MW |
| Kinetic energy | 1.334 GeV |
| Repetition rate | 50 Hz |
| Beam pulse duration | 2 x (0.48 to 0.56) ms |
| Pulse duration (RF) | 1.06 to 1.22 ms |
| Duty cycle (RF) | 5.3 to 6.1 % |
| Pulse chopping duty cycle | 70 to 60 % |
| Iaverage during micropulse | 114 mA |
| Iaverage during macropulse | 80 to 68.4 mA |
| Iaverage during period | 3.83 mA |
| Peak beam power for CCL | 98.7 to 84.6 MW |
| Fractional momentum error | <± 0.33 10-3 |
| Ramped momentum offset | 0 to 4 10-3 |
| Fractional momentum spread | <± 1.0 10-3 |
| Expected momentum spread | <± 0.4 10-3 |
| Normalised transverse rms emittances | <0.5 (p ) mm mr |
| Expected norm transv rms emittances | <0.4 (p ) mm mr |
| Ratio of longitud. to transv emittances | 1.83 |
RFQ
| Radio frequency | 280 MHz |
| RFQ length | 4.2 m |
| Output kinetic energy | 2.493 MeV |
| Output beam current | 57.0 mA |
| Normalised horizontal rms emittance | 0.23 (p ) mm mr |
| Normalised vertical rms emittance | 0.22 (p ) mm mr |
| Normalised longitudinal rms emittance | 0.41 (p ) mm mr |
| Input to output beam transmission | 96.0 % |
| LEBT input transverse matching | 3 solenoids |
| Output longitudinal phase extent | ± 30.0 degrees |
CHOPPER
| Chopper length | 1.71 m |
| Max gradients amongst 9 quadrupoles | <98 T/m |
| Max E0TL amongst 4, 280 MHz bunchers | <0.145 MV |
| Push-pull and single tr wve deflectors | 1 + 1 |
DTL
| Input energy | 2.493 MeV |
| Output energy | 20 MeV |
| Frequency | 280 MHz |
| DTL length | 9.34 m |
| Duty cycle (RF) | 5.3 to 6.1 % |
| Average current in micro-pulse | 57 mA |
| Average current in macro-pulse | 40 to 34.2 mA |
| Accelerating gradient (E0) | 2.75 to 2.9 MV/m |
| Synchronous phase | -420 to -380 |
| Shunt impedance, ZT2 | 51.5 to 66.5 MW /m |
| Transit time factors | 0.83 to 0.86 |
| Peak beam power | 1.4 to 1.2 MW |
| Peak structure power | 0.6 MW |
| Average DTL power | 0.096 to 0.101 MW |
| Peak power per klystron/IOT | 1.3 MW |
| Number of klystrons/IOTs | 2 |
| DTL tanks in common enclosure | 2 |
| Number of klystrons/IOTs per tank | 1 |
| Number of cells in DTL | 42 + 22 |
| Focusing pattern | FODO |
| Quadrupole gradients | 92 to 60 T/m |
| Transverse tune per FODO period | 33.3 to 27.30 |
| Bore hole diameter | 13 mm |
DTL CELL PARAMETERS
| Energy | 2.493 MeV | 20 MeV | |
| Cell diameter | 660 mm | ||
| Cell length, L (=bl ) | 75 mm | 214 mm | |
| Drift tube radius, RD | 75 mm | ||
| Drift tube length, LD | 58.3 mm | 166 mm | |
| Quadrupole length, LQ | 41.8 mm | ||
| Gap length, LG | 16.7 mm | 48 mm | |
| Outer corner radius, R0 | 7.5 mm | ||
| Inner corner radius, Ri | 2.5 mm | ||
| Face angle of drift tubes | 30 |
FUNNEL
| Energy | 20 MeV |
| Frequencies | 840, 560, 280 MHz |
| Funnel length | 6.23 m |
| Number of 840 MHz bunchers | 2 x 5 |
| Number of 560 MHz dual bunchers | 1 |
| Focusing pattern | 9 b l FODO |
| Number of FODO cells | 6 |
CCDTL
| Input energy | 20 MeV |
| Output energy | 100.0 MeV |
| Frequency | 560 MHz |
| CCDTL length | 63.5 m |
| Repetition rate | 50 Hz |
| Duty cycle | 5.3 to 6.1 % |
| RF bunch current | 114 mA |
| Average current in macro-pulse | 80 to 68.4 mA |
| Average current including duty cycle | 3.83 mA |
| Accelerating gradient (E0) | 2.25 MV/m |
| Synchronous phase | -300 |
| Shunt impedance, ZT2 | 40 to 30 MW /m |
| Average transit time factor | 0.87 |
| Peak beam power | 6.5 to 5.6 MW |
| Peak structure power | 5.5 MW |
| Average CCDTL power | 0.58 to 0.62 MW |
| Peak power per klystron | 1.3 MW |
| Number of klystrons | 12 |
| Number of cavities | 150 |
| Cavity length (3bl ) | 0.33 to 0.68 m |
| Number of cells per cavity | 2 |
| Focusing pattern | 10 b l FODO |
| Quadrupole gradient | 18.3 to 13.8 T/m |
| Bore hole diameter | 20 to 30 mm |
CCL1 and CCL2
| Input energy | 100.0 and 251.5 MeV |
| Output energy | 251.5 and 1334 MeV |
| Frequency | 560 MHz |
| CCL lengths | 92.8 and 595.4 m |
| Repetition rate | 50 Hz |
| Duty cycle | 5.3 to 6.1 % |
| RF bunch current | 114 mA |
| Average current in macro-pulse | 80 to 68.4 mA |
| Average current including duty cycle | 3.83 mA |
| Accelerating gradient (E0) | 2.25 and 2.71 MV/m |
| Synchronous phase | -28.5 and -25 0 |
| Shunt impedance, ZT2 | 29 to 42 MW /m |
| Average transit time factor | 0.86 |
| Peak beam power | 12.25 and 86.4 MW |
| Peak structure power | 12.0 and 77.0 MW |
| Average CCL power | 1.16 and 7.84 MW |
| Peak power per klystron/IOT | 2.6 / 1.3 MW |
| Number of klystrons/IOTs | 94 or 188 |
| Number of cavities | 60 and 228 |
| Cavity length (4bl , 5b l ) | 0.91 to 2.44 m |
| Number of cells per cavity | 8 and 10 |
| Focusing pattern | 11 and 12 b l FODO |
| Quadrupole gradients | 13.4 to 11.8 T/m |
| Bore hole diameters | 35 to 40 mm |
| Output length of line for beam debunching | ~ 72.0 m |
ACHROMATIC COLLIMATION LINE
| No. of triplet superperiods | 3 |
| No. of combined function BF magnets | 16 |
| No. of combined function BD magnets | 16 |
| Length of BF and BD magnets | 3.05 m |
| Bend angle of BF and BD magnets | 5.625 deg |
| Central field in the BF and BD units | 0.222 T |
| Form of the BF and BD magnets | C-core, parallel edged |
| Average radius of achromatic arc | 42.5 m |
| Normalised gradients of the BF and BD units | -0.01337, 0.009986 m-2 |
GENERAL RING PARAMETERS
| Number of 1.333 GeV accumulators | 2 |
| Pulse repetition frequency | 50 Hz |
| Accumulator mean radius | 35.0 m |
| Proton revolution frequency | 1.2412 MHz |
| Horizontal betatron tune | 4.19 |
| Vertical betatron tune | 4.31 |
| Gamma transition | 4.93 |
| Normalised dispersion at stripping foil | 1.60 m ½ |
| Number of circulating protons per ring | 2.34 1014 |
| Average circulating ring current | 46.53 A |
| Ramped H- fractional momentum offset | 0 to 4 10-3 |
| Collimated H- beam transverse emittances | 2.0 (p ) mm mr |
| Ring rms unnormalised beam transv emitts | 30.0 (p ) mm mr |
| Ring collimated beam transv emittances | 260.0 (p ) mm mr |
| Ring transverse acceptances | 480.0 (p ) mm mr |
| Number of ring superperiods | 3 |
| Number of triplet cells per superperiod | 6 |
| Number of straight sections per superperiod | 3 |
| Number of main bending cells per superperd | 2 |
| Number of special bending cells per superpd | 1 |
| Radio frequency harmonic numbers | 1 and 2 |
| Number of straights for rf per ring | 1 |
| Number of straights for extraction per ring | 2 |
| Number of straights for collimators per ring | 3 |
RING MAGNET PARAMETERS
| Magnet superperiods per ring | 3 |
| Cells per superperiod | 6 |
| Number of main dipoles, B, per ring | 12 |
| Form of B dipole, (parallel edges) | Curved, H-core |
| Bend angle for B | 28.1250 |
| Length of B | 3.0 m |
| Magnetic field in B | 1.1295 T |
| Number of rectangular dipoles, B1 | 3 |
| Bend angle for B1 | 7.50 |
| Length of B1 | 5.1043 m |
| Magnetic field in B1 | 0.17703 T |
| Number of main quadrupoles | 54 |
| Length of focusing quadrupoles | 0.36 or 0.34 m |
| Length of defocusing quadrupoles | 0.7 or 0.63 m |
| Gradients in quadrupoles | <7.4 Tm-1 |
| Inscribed radius for quadrupoles | 0.13 m |
RING RF PARAMETERS
| Main harmonic number, h | 1 |
| Revolution frequency x h | 1.2412 MHz |
| Peak kV/turn at injection | 8 |
| Additional harmonic number | 2 |
| Ratio V(2h) / V(h) at injection | 0.49 |
| Peak kV during storage | 37.0 |
| Ratio V(2h) /V(h) in storage | ~ 0.49 |
| No of `h’ cavities / ring | 3 (single) |
| No of `2h’ cavities / ring | 1 (double) |
| Length of `h’ cavities | 1.5 m |
| Length of `2h’ cavities | 2.2 m |
| No of circulating protons | 2.34 1014 |
| Synchronous phase | 00 |
| DC component of beam current | 46.53 A |
| Beam bunch extent at ejection | 0.6 m s |
| Pulse extent at target | 1.4 or 0.6 m s |
RING EXTRACTION PARAMETERS
| Required 99% field rise time | <190 ns |
| Unnormalised 100% extraction emittance | 260 (p ) mm mr |
| Number of push-pull kicker magnets | 4 |
| Space between kickers | 0.17 m |
| Space between kicker 4 and triplet | 0.5 m |
| Space between triplet and septum input | 7.11 m |
| b h at kicker 4 output | 12.77 m |
| b vat kicker 4 output | 13.75 m |
| b h at septum input | 15.16 m |
| b vat septum input | 13.07 m |
| Total deflection of kickers | 14.1 mr |
| Kicker feeder impedance | 8.333 W |
| Kicker current | ~ 5.0 kA |
| Pulse forming network voltage | ~ 41.5 kV |
COLLIMATORS
| Number of adjacent straights involved | 3 |
| Number of primary transv collimators | 2 |
| Number of secondary transv collimators | 5 |
| Number of first turn momentum collimators | 1 |
| Number of additional momentum collimators | 1 |
BEAM DUMPS
| Linac high power beam dump | 5 MW |
| Linac direct beam dump | 100 kW |
| Rings’ high power beam dump | 5 MW |
| Unstripped H- beam dump | 200 kW |
| Collimator beam dumps (5) | 5 kW |