Beamlines NORTH AREA

The H2 Beam

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This is a high-energy general purpose beam, suitable both for tests and experiments. The following versions of the optics exist:
Parallel optics for NA43: Optics drawing (Postscript)
Heavy ion optics:
Test beam optics (mixed mode): Optics drawing (Postscript)
Experiments along this Beam:
NA43 - Zone PPE 142 (not active, installation still in place)
NA49 - Zone PPE152
Test facilities along this Beam:
H2A - Zone PPE 172
User Guide for the H2A zone.
Logfile from control system Liaison physicist:  Adrian Fabich Beam Line supervisor:

The H4 Beam

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This is a high-energy general purpose beam, suitable both for tests and experiments. The following versions of the optics exist:
High-resolution optics:
High-acceptance optics:
Heavy ion optics: Optics drawing (Postscript)
Test beam optics (mixed mode): Optics drawing (Postscript)
Experiments along this Beam:
NA44
- Zone PPE 134 (completed)
NA57 - Zone PPE 134 (completed in 2002, installation still in place)
Test facilities along this Beam:
H4B - Zone PPE 164
User Guide for the H4A zone.
Logfile from control system
Various infos related to the H4 and the T2 wobbling Liaison physicist: Adrian Fabich. Beam Line supervisor:

The H6 Beam

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This is a secondary or tertiary test beam with energies in the range between 5 and 205 GeV/c. However, the secondary beam momentum is coupled to the H8 and P41/P42 beam momenta. The beam is also used by the NA52 experiment as a high-resolution spectrometer for searches of particles produced in collisions of high energy lead ions with heavy target atoms. The following versions of the optics exist:
High transmission optics:
Optics drawing (Postscript)    (PDF)
Test beam optics (mixed mode): Optics drawing
A3-colour PS (PDF) or A4-monochrome PS (PDF).
Experiments along this Beam: Test facilities along this Beam:
TIS/RP - Zone PPE 126
H6A - Zone PPE 146
H6B - Zone PPE 156
H6C - Zone PPE 166
User Guide
Logfile from control system Liaison physicist: Edda Gschwendtner Beam Line supervisor:

The H8 Beam

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This is a high-energy general purpose beam, suitable both for tests and experiments. In microbeam mode it can provide a very small spot attenuated primary proton beam. The following versions of the optics exist:
High-resolution optics:
High-acceptance optics:
Test beam optics (mixed mode):
A3 colour PS (PDF) or A4 monochrome PS (PDF)
Microbeam optics: Optics drawing (Postscript)
Heavy ion optics: Optics drawing (Postscript)
Experiments along this Beam:
NA45 - Zone PPE 138 (completed, installation still in place)
Test facilities along this Beam:
H8A - Zone PPE 158
H8B - Zone PPE 168
User Guide
Logfile from control system Liaison physicist:  Ilias Efthymiopoulos, Beam line supervisor :  

The M2 Beam

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This is the CERN high-intensity muon beam. It consists of an approximately 600 metres long pion and kaon decay channel, at ther end of which the remaining hadrons are observed in up to 9.9 metres of Beryllium. The remaining muon beam is shaped and cleaned in the 400 metres long muon section of the beam. Schematic view of the M2 muon beam < click for full picture The following versions of the optics exist:
Muon beam: Hadron section optics: Optics drawing (Postscript) (PDF)
Muon beam: Muon section optics: Optics drawing (Postscript) (PDF)
Hadron beam: Full beam optics: Optics drawing (Postscript) (PDF)
Hadron beam: -225 GeV/c optics (compatible with protons in P61): Optics drawing (Postscript) (PDF)
Electron beam: Secondary beam optics (T6 to secondary target): Optics drawing (Postscript) (PDF)
Electron beam: Tertiary beam optics (Secondary target to COMPASS): Optics drawing (Postscript) (PDF)
Experiments along this Beam:
NA58 (COMPASS) - Zones PPE211, PPE221
This beam has recently been upgraded for the COMPASS experiment.
The commissioning of the M2 beam in 1999 is summarised here.
User Guide
Quick Reference
Draft tuning procedure
Logfile from control system Liaison physicist: Lau Gatignon

The P41/P61 Beam

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These beams are high-intensity proton transport beams from the primary targets T4 (P41) or T6 (P61) to the experimens at the Jura side of ECN3. The branch P61 can also serve as a heavy ion beam. If necessary, secondary beams can be created from a secondary target located some 200 metres upstream of the end of ECN3. Depending on requirements in the H8 and H6 beams, pure and high-resolution electron beams can be provided by conversion of photons produced in T4. The P41/P61 beams are part of the P0 complex. The following versions of the optics exist:
Attenuated proton optics from T4: Optics drawing (Postscript) (PDF)
Attenuated proton optics from T6: Optics drawing (Postscript) (PDF)
Heavy ion optics: Optics Optics drawing (Postscript) (PDF)
Electrons from conversion of photons from T4: Optics drawing (Postscript) (PDF)
Experiments along this Beam:
NA50 - Zone ECN3
Short User guides exist for the P41, P61 and H10 beams. A special User Guide for P0 Ion beams, as well as a User Guide for P0 Proton beams to NA50 and NA60 are available as well.
P41+H10 Logfile from control system
P61+H10 Logfile from control system Liaison physicist: Lau Gatignon

The P42+K12 Beams

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  The P42 beam is a transport system for primary proton beams from P4 to the T10 target.
The K12 beam consists of simultaneous KL and KS beams coinciding at the NA48 experiment at the Salève side of ECN3. The KL beam is a secondary beam produced at T10. A small fraction of the protons that traverse T10 without interaction are recuperated by a bent Silicon crystal and transported to a KS target, located some 120 metres downstream of T10. The KS target is 72 mm above the KL beam axis and from there the KS beam is produced and steered to converge with the KL beam with an angle of 0.6 milliradians. A schematic view of the K12 beam layout is available.
A collection of figures is available here. A detailed description of the beam is available on the  CERN library web. A shortened version is available as well.
Under certain conditions an electron calibration beam can be made available for the detectors in ECN3 by conversion of photons originating from T4. The P42+K12 beams are part of the P0 complex.

The following versions of the optics exist:
P42 proton optics: Optics drawing (Postscript) (PDF)
K12 proton optics between T10 and KS target: Optics drawing (Postscript) (PDF)
Electrons from conversion of photons from T4: Optics drawing (Postscript) (PDF)
The underlying schematic K12 optics diagram allows you to click on most of the beam elements to get some more information about them!
The evolution of the emittance of the proton beams impinging on the KL and KS targets over the years is described in a separate Webpage. Experiments along this Beam:
NA48 - Zone ECN3
User Guide
Tuning Procedure P42+K12 (PS) (PDF) (1998 version)
P42 Logfile from control system
K12 Logfile from control system The geometry data for the layout of beam and experiment can be found here . Liaison physicist: Lau Gatignon
Last update: 07/15/2019 - IE