In recent years, memory technology has been advancing quickly. This paper presents the comprehensive radiation effects examination of two high density (64Mb and 128Mb) 0.35 μm CMOS Synchronous Dynamic Random Access Memories (SDRAMs). This study uses the major components of the natural near earth environment to determine the applicability of these parts to space missions. Protons have been used ...

Exposure to the types of ionizing radiation encountered during space travel may cause a number of health-related problems, but the primary concern is related to the increased risk of cancer induction in astronauts. The major types of radiation considered to be of importance during space travel are protons and particles of high atomic number and high energy (HZE particles). It is now clear that ...

A recent discovery concerning the importance of hadron production in space radiation is that pions can contribute up to twenty percent of the dose from galactic cosmic ray interactions (S. Aghara, S. Blattnig, J. Norbury, R. Singleterry, Nuclear Instruments and Methods, Vol. 267, 2009, p. 1115). Although the contribution for dose equivalent will be smaller, the dose contribution could be import...

High-speed computational procedures for space radiation shielding have relied on asymptotic expansions in terms of the off-axis scatter and replacement of the general geometry problem by a collection of flat plates. This type of solution was derived for application to human rated systems in which the radius of the shielded volume is large compared to the off-axis diffusion limiting leakage at l...

1.0 Introduction ........................................................................................................................................ 2 2.0 Radiation Hardness Assurance Overview .......................................................................................... 2 3.0 Define the Space Radiation Environment ..................................................................

T HE POTENTIAL medical hazards of man's venture into space will span a number of disciplines in regard to the pathology and deranged physiology to which the human body may be subject in travel beyond the earth's atmosphere. Not the least hazard is that having to do with the effects of radiation to be encountered in free space. This problem is one which is receiving considerable attention from a...

The space radiation environment can have serious effects on spacecraft electronics. For example, accumulated damage from electron and proton exposure will limit system endurance. Transient effects from individual high-energy protons or cosmic rays can disrupt system operation, perhaps irreversibly. Of particular importance in assessing the impact of the space radiation on electronic devices are...

We have measured the radiation transport and dose reduction properties of lunar soil with respect to selected heavy ion beams with charges and energies comparable to some components of the galactic cosmic radiation (GCR), using soil samples returned by the Apollo missions and several types of synthetic soil glasses and lunar soil simulants. The suitability for shielding studies of synthetic soi...

TSUNG-YU KAO,* JOHN L. RENO, AND QING HU LongWave Photonics LLC, Mountain View, California 94043, USA Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Sandia National Laboratories, Center of Integrated Nanotechnologies, MS 1303, Albuquerque, New Mexico 87185, USA *Corresponding author: wilt_kao@longwavephotonic...