[en] The Superconducting Super Collider is the first proton superconducting accelerator designed to operate at 20 TeV with beam current of 72 mA in which synchrotron radiation is a significant design factor. The Collider will produce a synchrotron power of 0.14 W/m and 18 kW total at 4.2 K. This synchrotron light will produce considerable photodesorbed gases in the beam vacuum. The photodesorbed gases may greatly reduce the beam lifetime and scattered beam power may lead to quenching of superconducting magnets. The Collider availability may be unacceptable without properly addressing this concern. A liner is one method under consideration to minimize the presence of photodesorbed gases. A liner prototype has been developed for prototype testing at the Accelerator System String Test facility since the half cell is an existing basic unit of the Collider. The liner operational temperature was required to be 80 K based on photodesorption data available from the CDG and SCDG measurements. Those data showed that liners at lower temperatures 20 K or 4.2 K had either unacceptable impedance margins or excessively long conditioning periods. An 80 K liner also replaces the 4 K dynamic heat load of the synchrotron radiation with a static heat load, independent of the beam intensity, and transfers the intercepted heat to the liquid nitrogen system. Developing a liner system presents scientific and technical challenges. The system design addresses photodesorption, particle beam stability, magnetic field quality, beam induced wake fields, rf impedance, cryogenics, magnet quenching, and many other interdisciplinary technical problems. This paper presents the results of trade studies, analyses and engineering design of an 80 K liner and also briefly discusses the preliminary consideration of lower temperature liners