SEC experiment

The Scattering Experiments Chamber (SEC) experiment is a permanent experimental setup located in the ISOLDE facility at CERN. The station facilitates diversified reaction experiments, especially for studying low-lying resonances in light atomic nuclei via transfer reactions.^[1] SEC does not detect gamma radiation, and therefore is complementary to the ISOLDE Solenoidal Spectrometer (ISS) and Miniball experiments.^[2]

Isotope Separator On Line Device
(ISOLDE)

List of ISOLDE experimental setups
COLLAPS, CRIS, EC-SLI, IDS, ISS, ISOLTRAP, LUCRECIA, Miniball, MIRACLS, SEC, VITO, WISArD
Other facilities
MEDICIS	Medical Isotopes Collected from ISOLDE
508	Solid State Physics Laboratory v t e

The SEC chamber at CERN

Experimental setup

The SEC experiment uses radioactive ion beams from ISOLDE, at the end of XT03 beamline of the HIE-ISOLDE facility.^[3] The ion beam first passes through a collimator, of 15 mm aperture, surrounded by 4 silicon detectors, designed for beam optimisation.^[4]

The SEC chamber has a diameter of 1 m and height of 50 cm, with the reaction target placed in the centre on a motorised target holder. The target holder has the space for four targets, and each target can be moved in place via remote control. The reaction target is surrounded by double-sided silicon strip detectors (DSSSD) which are positioned so that the angular coverage is optimised, depending on the experiment.^[5] DSSSDs allow for efficient detection of all emitted particles in the reaction.^[6] The main support for the detector is a circular movable table which has radially arranged holes at the centre.^[4]

SEC experiment at the ISOLDE facility (CERN)

GLORIA

GLORIA (GLObal ReactIon Array) is a configuration used in SEC to measure fragments produced in reactions. It consists of six silicon telescopes, which surround a certain scattering angle of the reaction target (from 15° to 160°.^[7][8] GLORIA was designed to have a compact geometry with the ability to resolve mass and ion charge up to carbon isotopes, due to the two-stage DSSD telescopes.^[8]

SAND

The SAND array is used at the scattering chamber SEC, for the detection of charged particles and neutrons.^[9] The array consists of 30 modules, each being a plastic scintillator with fast photomultiplier tubes. The array can be moved to bring it closer to the target.^[10]

External links

• SEC page on ISOLDE website
• SEC website