The combination of red mud (RM) and phosphogypsum (PG) can exert the alkalinity RM acidity PG as a calcium source to promote gel hardening composite cementitious material, which effectively improves reutilization efficiency and. In this study, effects ratio content pretreated on non-evaporated water, porosity, hydration products, mechanical properties, pore size distribution, microstructure mat...

Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Cement paste has a complex distribution of pores and molecular-scale spaces. This distribution controls the hystere...

A non-evaporable getter pump using the ZAO alloy was installed on TCV and operated during 2019 experimental campaign. The performance, determined from in-situ pumping speed measurements, indicates that current technologies are well suited to tokamak operations with high power exhaust plasmas, provide an interesting alternative for applications in fusion experiments.

In the beam pipe of the positron damping ring of the Next Linear Collider, electrons will be created by beam interaction with the surrounding vacuum chamber wall and give rise to an electron cloud. Several solutions are possible for avoiding the electron cloud, without changing the bunch structure or the diameter of the vacuum chamber. Some of the currently available solutions for preventing th...

In many accelerator storage rings running positively charged beams, multipactoring due to secondary electron emission (SEE) in the beam pipe will give rise to an electron cloud which can cause beam blow-up or loss of the circulating beam. A preventative measure that suppresses electron cloud formation is to ensure that the vacuum wall has a low secondary emission yield (SEY). The SEY of thin fi...

The Energy Recovery Linac (ERL) at Cornell University will require the use of thin film coatings for purposes of achieving Ultra High Vacuum (UHV). At this point, various pipe coatings have been widely used in the field of particle accelerator physics. The vacuum properties of pipe coatings are well documented and have given rise to its popularity in the field. A Non-Evaporable Getter (NEG) coa...