Mylar™ foil

Prototype electrostatic loudspeakers where the graphite is replaced by a-Si H have been made, where a Mylar foil (area 10 x 10 cm-, thickness 6 /im) is used [657]. Deposition of the a-Si H layer was carried out in the ASTER deposition system. Uniform deposition (standard deviation of thickness, 1.5%) was achieved by diluting the SiHa with Ht with SiHa Hi = 1 2 [370]. The deposition was at room temperature. The hydrogen content amounted to 18 at.%, and the bandgap was 1.81 eV. The dark conductivity and AM 1.5 photoconductivity were 7.5 X 10 and 1.8 x 10 cm" , respectively. In practice the film would not... 

Explain why helium-filled, Mylar-foil balloons can float freely for several weeks, but latex balloons for less than 24 hours. 

The inner counter cylinder, made of metallized Mylar foil, is leak-tight relative to the outer counter. By means of two solenoid valves actuated by a differential mercury manometer, the outer and inner counters can be filled separately with a pressure differential on the partitioning foil of less than 0.5 cm. Hg. This pressure controller minimizes the danger of rupturing the partition. Two control circuit diagrams are shown in Figure 3. Figure 3A shows the mercury tube with electrical... 

A1 window (AW), and e scintillators (ej and e2). The aperture electrode, the microchannel plate, and one pair of field coils have been omitted in order to simplify the picture. The inset shows a horizontal view of the target region with the u+ scintillator (S), aluminized mylar foil (AM), Si02 target (T), aperture electrode (A), and microchannel plate (M). 

We conducted some ERD measurements to study the hydrogen depth distribution of Ni(ya-Al203 samples after annealing in steam (fig. 7). A 2.2 MeV 4He+ beam was used and a 8.9 Jim Mylar foil. The recoil angle was 36q, and the angle between the beam direction and the sample normal was 72D. It is evident that ERD is a very powerful technique, since it is one of the few methods capable of quantitative depth profiling light elements in a heavy matrix. 

Fig. 4. The Recoil Transfer Chamber installed at the BGS focal plane (left), and the support grid for the MYLAR foil (right).

Mass Spectrometiy. Samples were introduced into a Californium-252 time-of-flight plasma desorption mass spectrometer in a 1% TFA solution applied to a nitrocellulose-covered aluminized Mylar foil. TTie samples were run at 15 kV accelerating volts with a 30-cm flight path, and the signal was accumulated for 19 hr (1),... 

Figure 15 shows the pattern made by the normal reflection of a detonation on a glass plate coated lightly with carbon soot, which may be from either a wooden match or a kerosene lamp. The cellular structure of the detonation front is quite evident. If a similarly soot-coated polished metal (or mylar) foil is inserted into a detonation tube, the passage of the detonation wave will leave a characteristic fish-scale pattern on the smoked foil. Figure 16 is a sequence of laser-Schlieren... 

Alpha (a) Thin sheet of plastic scintillator or zinc sulfide embedded in a transparent tape Phosphors are wrapped in very thin aluminized mylar foil to exclude light. a-Particles, because of low penetrating power, lose all their energy to scintillators. P- and y-Particles produce only smaller pulses and by adjustment of appropriate setting of the discriminator, a-Particles alone can be counted. 

Figure 13, A schematic drawing of the low temperature device of Bartunik and Schubert, with the flow cell arrangement. The flow cell is mounted on a standard goniometer head. Cold Nj gas passes through the inner chamber, its temperature is controlled by a sensor and heating coil. Dry circulates through the outer chamber in order to prevent the windows from icing. The walls of the inner and outer parts consist of mylar foils of 8 pm thickness. From Bartunik and Schubert [233].

We have proposed still another approach [9] A 900-nm thick Mylar foil is used as H+-sensitive layer and also as mechanical support of the whole device. The main feature of the proposed device is that it is a mechanical support-free, lightweight and totally flexible structure (see Fig. 6.4). 

The working principle of this device is similar to other ISOFETs described here, with some differences arising due to the different materials employed. In particular, while the electrochemical phenomena occurring at the electrolyte/ inorganic dielectric interface are well known, a site-binding model that explains in detail the mechanism at the surface for the Mylar foils has not yet been developed. Nevertheless, the sensitivity of the device to the pH variation has been demonstrated (as shown in Fig. 6.5)... 

In view of the influence of particle size on inhalation radiation exposure, some collectors of discrete particle sizes are deployed, typically for research rather than routine monitoring. Impactors with metal plates or Mylar foils that are sprayed with silicone to reduce particle bounce (ACGIH 2001) have proven useful, but can challenge radioanalytical chemistry preparations. An aerosol spectrometer with a series of metal screens (ERA 2004) may present less of a chemical preparation problem. 

The sample, which is considerably smaller than the bore of the beam collimator ( 10mm dia.), is mounted on a thin mylar foil on top of a cup-shaped scintillation detector (veto counter). The mylar is essentially transparent to the incoming muons. Thus,... 

Usually, the positron source NaCl is sealed between very thin metal (Ni, Ti) or polymer (kapton, Mylar) foils. The thickness (i.e., surface density) of these foils is around 1-2 mg/cm, but several percents of positrons annihilate in this wrapping even in the case of the thinnest foil. During spectrum evaluation, positrons annihilated in the source foil should be taken into account. 

Fig. 3.5. Energy of different particles after being recoiled at an angle of 36° by a 30MeV Si-ions before full line - upper curve) and after dashed line - lower curve) passing a 9 pm mylar foil...

C, external coils D, cathode, including 2 ym mylar foil ... 

You may have seen Charles s Law in action when a latex rubber or Mylar foil balloon was subjected to a temperature change. A rubber balloon left in a hot car will expand significantly. Either balloon will shrink when brought from a warm home or store to the cold outdoors on a winter day. 

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