Non-contact distance: at least two in from the surface being screened.
Surface types to be sampled: Muslin, Nomex, Bytac, ABS plastic, vinyl, Teflon, packaging tapes, cardboard, cotton, metal, plastic zipper, and leather.
Broad spectrum threat sampling capability: Sampling capability for at least twenty explosives covering aliphatic organic nitrates, aromatic organic nitrates, organic peroxides, inorganic salts, plastics explosives, inorganic salt/fuel mixtures.
Collection efficiency: Ability to deliver >50% of the threat related trace amount to the sensor/detection engine. If a preconcentration component/method is involved, then collection efficiency is defined as the ability to deliver >50% of the threat related trace amount to the preconcentration component.
Size of object sampled: Focus on two of the following three object scales: 1. localized region of passengers' body (~200 square centimeter), 2. carry-on baggage (~0.8 square meter), 3. checked baggage (~1.3 square meter).
Sampling time: <= 5 sec per sampling event.
Clear-down time after alarm (cleaning time between samples to prevent memory effect): not to exceed two minutes.
Reliability: minimal maintenance required similar to reliability specification of currently deployed ETDs.
Seamlessly integrated with or integration-ready with currently deployed Explosives Trace Detectors (ETDs) and/or Next Generation ETDs: Integration schemes may include the uses of a pre-concentration component, a desorber component, an ionization source, and/or a transfer line. Candidate technologies need to have provisions for how such integration can be accomplished. These include sizes and methods for coupling the samplers to the detection engines, what components of an ETD are to be kept and what components are to be taken out. The task of integration should not impact detection capabilities of ETDs. If detection capabilities of the ETDs are impacted (negatively) by the integration, technology developers need to devise a mitigation plan to circumvent or overcome these impacts.